Lifetime for traditional optics; 3-5 years for digital scopes
Learn More Here
Fast Delivery
In-stock items ship via UPS/USPS in 2-3 days
In-stock items ship via UPS/USPS in 2-3 days
Learn More Here
Easy Returns
30-day return & exchange
30-day return & exchange
Learn More Here
Hassle-Free Warranty
Lifetime or 3-5 years
100% Secure Shopping
4 interest-free payments with sezzle at checkout!
Safe checkout with simple, trusted payment options
4 interest-free payments with sezzle at checkout!
Happy Customer Reviews
RO
Rob
Awesome scope
Awesome scope. Intuitive button layout and design, clear image. Choose your base mag carefully, 5x for me might be a little much for closer shots at night, but for daytime shooting and hunting, I like the extra magnification on the top end.
Thoroughly impressed. Shooting on my 350 legend. Not the highest priced option. Punching hogs and coyotes within 150 yards this makes it easy. battery life exceptional. Handles recoil with no problems. Loving it!
The thermnight line of scopes are the only ones of their kind on the market and capable of doing it all with a tremendous amount of features packed into one scope. I have the TNC225R and the TNC635R. The resolution on the 635 is amazing and has a wide field of view for scanning in thermal and customer service from DNT is top notch. I highly recommend and of the thermnight models.
Put the scope on immediately and could tell the difference. The glasses is clear the focus is extremely good. The center dot in the reticle is very very small, but that may have something to do with old eyes. Would definitely recommend.
Originally published by BoomStick Tactical, this article provides a head-to-head comparison of the Arken Optics EP5 and DNT Optics' TheOne. We're pleased to share their review.
Imagine lining up a shot at 1,000 yards, the target a mere speck on the horizon. Your scope is your lifeline, transforming that distant speck into a clear, actionable image. For long-range shooters, whether in competitive PRS matches, tactical scenarios, or big-game hunting, the right optic can make or break the shot. Enter the Arken Optics EP5 and DNT Optics TheOne—two high-performance rifle scopes that promise precision, durability, and value. Built in the same factory with nearly identical specifications, these scopes are close cousins, yet subtle differences set them apart. In this article we dive into their specs, performance, and user feedback to help you decide which scope deserves a place on your rifle.
Background on the Scopes
Arken Optics EP5
Arken Optics has carved out a reputation for delivering high-quality, precision-engineered scopes at competitive prices. The EP5 series, particularly the 7-35×56 Gen 2 model, is designed for long-range shooting, boasting features like ED Japanese glass and robust construction rated for heavy calibers like .50 BMG. It's a favorite among shooters who demand reliability without breaking the bank.
DNT Optics TheOne
DNT Optics is a newer player, emerging as the factory's "internal brand" behind Arken's scopes. TheOne 7-35×56 scope is positioned as a direct competitor to the Arken EP5, using similar materials but with distinct branding and, according to some users, slight enhancements in design or aesthetics. As a fresh face in the optics market, DNT aims to combine cutting-edge technology with affordability.
Shared Roots
Both scopes are manufactured in the same facility, using the same high-quality materials, such as ED glass for superior clarity. This shared lineage means their core specifications are remarkably similar, but differences in reticle design, adjustment range, and branding create a compelling comparison. As one user on Canadian Gun Nutz noted, "I can honestly say I prefer the DNT over the Arken," hinting at potential improvements in the newer brand's offering.
Specifications Comparison
The Arken EP5 and DNT TheOne share many specifications, making them near twins in performance. However, subtle differences could sway your decision. Below is a detailed breakdown.
Common Specifications
Both scopes are engineered for long-range precision, with identical core features that ensure top-tier performance:
Specification
Arken EP5 7-35×56 Gen 2
DNT Optics TheOne 7-35×56
Magnification
7-35x
7-35x
Objective Lens
56mm
56mm
Tube Diameter
34mm
34mm
Field of View
~16.65 ft @ 7x, ~3.30 ft @ 35x (100 yds)
16.66 ft @ 7x, 3.34 ft @ 35x (100 yds)
Eye Relief
3.5 inches
3.5 inches
Weight
42 oz
42 oz
Length
16 inches
16 inches
Reticle Type
FFP, Illuminated
FFP, Illuminated
Zero Stop
Yes
Yes
Magnification and Objective Lens: Both offer a versatile 7-35x zoom range and a 56mm objective lens, ensuring excellent light transmission for low-light conditions.
Tube Diameter: The 34mm tube is standard, providing compatibility with most mounts and ample internal adjustment range.
Field of View: Nearly identical, with DNT having a marginally wider FOV at 35x (3.34 ft vs. Arken's 3.30 ft at 100 yards), a difference likely imperceptible in practice.
Eye Relief: Both provide a fixed 3.5-inch eye relief, suitable for heavy-recoil rifles.
Weight and Length: At 42 oz and 16 inches, both scopes are hefty but manageable for long-range setups.
Reticle and Zero Stop: Both feature first focal plane (FFP) reticles, which scale with magnification, and zero-stop turrets for quick return to zero.
Key Differences
While the scopes are strikingly similar, a few distinctions could influence your choice:
Specification
Arken EP5 7-35×56 Gen 2
DNT Optics TheOne 7-35×56
Adjustment Range
Elevation: 32 MRAD (110 MOA)
Windage: 16 MRAD (55 MOA)
Elevation: 30 MRAD (108 MOA)
Windage: 15 MRAD (54 MOA)
Reticle Design
VPR (Variable Precision Reticle), 6 brightness levels, red
TOR (The One Reticle), MPR, TOR 0.2 MIL, illuminated (Editor's note: 6 brightness levels, red)
Brand Positioning
Established brand
Newer brand, potential enhancements
Adjustment Range: The Arken EP5 offers slightly more adjustment (32 MRAD vs. 30 MRAD for elevation; 16 MRAD vs. 15 MRAD for windage), which could be advantageous for extreme long-range shooting where every mil counts.
Reticle Design:
Arken VPR: A Christmas tree-style reticle with detailed holdover and windage marks, ideal for competitive shooters who need precise calculations. It features six red illumination levels with an "off" setting between each.
DNT TOR: The One Reticle (TOR) and Multi-Purpose Reticle (MPR) are designed for versatility, potentially simpler for general-purpose shooting. The TOR 0.2 MIL variant suggests fine adjustments for precision. Illumination is confirmed but brightness levels are unspecified (Editor's note: six red brightness levels).
Brand and Aesthetics: Arken is a well-known name with a proven track record, while DNT is a newer brand with a fresh aesthetic. Some users report preferring DNT's look, with one noting its "knurling kinda reminds me of Nightforce stuff" for a premium feel.
Performance and User Experience
Optical Quality
Both scopes utilize ED (Extra-Low Dispersion) glass, ensuring sharp, clear images with minimal chromatic aberration. User reviews praise both for clarity at long distances (e.g., 880 yards for Arken, per a Reddit user). DNT claims slight enhancements, possibly in glass coatings or image processing, but without detailed data, this remains speculative. Both perform well in low-light conditions, though Arken's eye box is noted as somewhat unforgiving at higher magnifications.
Turret and Adjustment Feel
Both scopes feature tactile, audible turrets with zero-stop functionality, ensuring reliable adjustments under stress. Arken's turrets are described as "crisp" and "repeatable," while DNT's are similarly praised for precision. No significant differences in turret feel are reported, but real-world testing could reveal nuances.
Reticle Comparison
Arken VPR: The Variable Precision Reticle is information-rich yet uncluttered, with a fully illuminated center cross for twilight use. It's tailored for long-range holdovers, making it a favorite for PRS and tactical shooters.
DNT TOR: The One Reticle and MPR aim for versatility, potentially simpler for hunters or multi-purpose shooters. The TOR 0.2 MIL variant suggests fine granularity for precision shooting. Without detailed reticle images, it's unclear how they compare visually, but user feedback suggests TOR is user-friendly.
Durability
Both scopes are rated for heavy recoil, up to .50 BMG, ensuring durability on powerful rifles. Arken's robust housing and premium internals are well-documented, while DNT's shared manufacturing suggests comparable resilience.
Eye Relief Comparison Between Arken Optics EP5 and DNT Optics TheOne
When comparing the Arken Optics EP5 7-35×56 Gen 2 and the DNT Optics TheOne 7-35×56, one of the key specifications to consider is eye relief, as it directly impacts the shooter's comfort and safety, particularly with high-recoil rifles. Both scopes share identical eye relief measurements, offering 3.5 inches of eye relief.
When zooming into the target, the eye relief did decrease slightly with both scopes but remained very usable.
Why Eye Relief Matters
Eye relief is the distance from the eyepiece of the scope to the shooter's eye where the full field of view remains visible. For long-range shooting, where precision and comfort are paramount, adequate eye relief is essential. It ensures that the shooter can maintain a consistent cheek weld while still seeing the entire field of view, even under recoil. A 3.5-inch eye relief is considered standard for high-performance scopes designed for long-range applications, as it accommodates a wide range of rifle calibers, including heavy-recoil options like .300 Win Mag or even .50 BMG.
Detailed Comparison of Eye Relief
Both the Arken Optics EP5 and DNT Optics TheOne are specified with a 3.5-inch eye relief, which was confirmed through official product pages and supporting documentation. This measurement is consistent across their magnification range of 7-35x, ensuring that shooters can maintain a clear sight picture without adjusting their head position, even at high magnification.
Arken Optics EP5 7-35×56 Gen 2: The official product page (Arken Optics USA) lists the eye relief as 3.5 inches, aligning with the article outline and user discussions on forums like Snipers Hide and Reddit.
DNT Optics TheOne 7-35×56: Similarly, the DNT Optics Store (DNT Optics Store) and other retailers like myhighpressureair.com confirm a 3.5-inch eye relief, matching the Arken EP5 exactly. This shared specification reflects their common manufacturing origin, as both scopes are produced in the same facility with similar design principles.
Implications for Shooters
The identical eye relief of 3.5 inches between the two scopes offers several advantages:
Consistency: Shooters who own or switch between these scopes can expect a familiar shooting experience without needing to adjust their cheek weld or head position. This is particularly beneficial for competitive shooters or hunters who may use multiple setups.
Versatility: The 3.5-inch eye relief is suitable for a wide range of rifle types and calibers, making both scopes versatile for competitive shooting, hunting, or tactical use. It provides enough distance to prevent scope eye (brow strike) even with heavy-recoil cartridges, enhancing safety.
Safety and Comfort: With high-recoil rifles, a longer eye relief reduces the risk of injury from the scope striking the shooter's brow during firing. The 3.5-inch distance provides a safe and comfortable shooting experience, even under demanding conditions, such as extended range sessions or adverse weather.
Comparative Table of Eye Relief Specifications
Scope
Eye Relief
Magnification Range
Notes
Arken Optics EP5 7-35×56 Gen 2
3.5 inches
7-35x
Confirmed via official product page and user reviews.
DNT Optics TheOne 7-35×56
3.5 inches
7-35x
Matches Arken, confirmed by multiple retailers and forums.
This table summarizes the eye relief specifications, highlighting their identical nature and reinforcing the consistency between the two scopes.
User Opinions and Community Insights
User feedback highlights the strengths of both scopes:
A Canadian Gun Nutz user stated, "I have been very fortunate to have had the Arken EP5 Gen II 7-35×56 here together with the new DNT Optics 7-35×56 for the past 2 weeks, and I can honestly say I prefer the DNT over the Arken".
On Reddit, a user with an Arken EP5 reported "no problems with clarity at 880 yards," while DNT users praised its performance out to 1 mile.
For shooters like @BoomStickTact, engaging with communities on platforms like X or forums like Snipers Hide can provide real-world insights into these scopes' performance.
Conclusion
The Arken Optics EP5 and DNT Optics TheOne are remarkably similar, sharing identical magnification, objective lens, weight, length, and eye relief. The Arken edges out with a slightly larger adjustment range (32 MRAD vs. 30 MRAD), potentially benefiting extreme long-range shooters. The reticle is the primary differentiator: Arken's VPR suits precision-driven competitive shooting, while DNT's TOR offers versatility for varied applications. As products of the same factory, both deliver exceptional value, with DNT's newer branding possibly offering a fresh aesthetic or minor enhancements.
For shooters prioritizing a proven brand, the Arken EP5 is a safe bet. For those intrigued by a new contender with a unique reticle, DNT's TheOne is worth considering. Ultimately, your choice may depend on reticle preference or specific shooting needs. Check out user reviews on platforms like Snipers Hide or Reddit to dive deeper into real-world performance, and share your experiences to join the conversation!
Author: Nicholas C
Welcome! We at DNT Optics love to share our knowledge and our experiences in hopes they may help you. When it comes to seeing in the dark, many think that higher resolution is critical, but that is not always the case. In fact, you can be successful even with lower resolution systems. In the world of thermal, some people dismiss the entry level systems like 256 thermal devices. But we want you to know they can work and work well.
Yes, 256 thermal can absolutely work, but it is dependent on the activity you are pursuing. When hunting, think of how we normally hunt in the day time. We typically scan an area with our eyeballs first. Once our eye detects something of interest, we augment our natural vision with a tool that has magnification, like binoculars. If we see the game that we are pursuing, we then transition to our weapon and use our primary aiming device.
Higher resolution thermals can produce a nicer image, but there are other factors beyond pure resolution. Base magnification is something to take into account. If you compare 1x thermal devices like 640, 384, and 256, you'll see that at a certain point, there are diminishing returns. You can only see so far with said devices even if you spend more money. However, thermal excels at showing you a difference in temperature and since it does not rely on light like night vision, it can be used in absolute darkness. Thermals are very good at detecting heat, but being able to recognize, let alone positively identify, the object you are looking at requires you to get physically closer or use magnification (optical, not digital).
Remember, thermal devices are tools, and like other tools, they have their uses. A 256 resolution thermal can have its use in your tool box. A small 1x thermal scanner is easier to scan with at night than pointing your gun and moving it around all night just to look for potential game. 256 thermal monoculars are more affordable and they can help you scan an area to detect potential game quickly. Scan a field, see anything living? No? Now you can plan your next move. On the other hand, if a 256 thermal scanner shows you something of interest, then you need to decide what your next move is. Move closer or wait for it to come closer? Or deploy a higher magnification thermal or higher resolution thermal.
Our Hydra series of thermal scopes have an AI algorithm that we call Super Resolution. When you turn it on, the image is sharpened. For the entry level Hydra HS225, it enhances the image at any magnification, making a 256 sensor thermal image as clear as a 384 sensor. Higher resolution models like the HS325 or HS635 further benefit from Super Resolution when digitally zooming in. With Super Resolution, a 384 sensor can deliver clarity comparable to a 576. A 640 sensor can reach an impressive 960 at its 6x magnification. Depending on the size and distance of the object you are looking at, the Super Resolution might help you see it more clearly. This can help inform you on your next move. Do you continue to pursue or move on to another target?
Lower resolution thermals are not a substitute for higher resolution devices but they have their uses. They are usually more affordable and when utilized properly, they can absolutely help you on your hunt.
Start with the right tool for the job. Discover the Hydra series now.
It all started with a crunch.
While walking through quiet Marco Island, John Johnson heard something unsettling. Following the sound, he found a large green iguana devouring an owl egg. As the frantic owl parents screeched, John knew exactly what he was looking at—an invasive species.
Green iguanas aren't native to Florida. Since arriving in the 1960s via the pet trade and accidental escapes, they've thrived. With lifespans of up to 20 years, females capable of laying as many as 71 eggs a year, and no natural predators, their population has exploded.
The result? Widespread damage. Reaching up to 5.6 feet in length and weighing over 15 pounds, iguanas dig deep burrows that undermine sidewalks and seawalls. Their climbing habits lead to roof damage and power outages. On top of that, they carry Salmonella, posing health risks to people and pets.
Over the years, Florida's iguana problem has grown from a mere concern to a full-fledged crisis. Seeing the destruction firsthand, John knew it was time to act. As a lifelong hunter who started out with a BB gun as a kid in the Pacific Northwest, John had the experience and passion to take on the iguanas.
In 2023, he founded Down Goes Iguana, a company dedicated to removing these invasive creatures from Marco Island's shores. That year, he removed 253 iguanas. By 2024, the number soared to 730, with 56% of them being females. This means John prevented over 20,450 iguanas from hatching, as each female can lay about 50 eggs annually.
As a registered Florida State Wildlife Control Officer, John carries out humane, regulated, and highly precise iguana removals. His mission is to protect Florida's native species and restore the balance of nature. And he's not alone in this fight.
When DNT first learned about John, it wasn't just his impressive numbers that stood out, but his precision, principle, and purpose. He embodies the values our gear was designed for. So, we decided to support his efforts by equipping him with the ZULUS HD 5x20 LRF scope, a versatile digital day-and-night vision device built for real-world performance.
For John, the ZULUS HD quickly became essential. Mounted on his Brocock Atomic Carbine air rifle, it gave him the clarity and confidence for precise shots, even in challenging conditions. As he puts it, "The lightweight ZULUS is a game-changer when I have to hand-hold."
Beyond portability, the ZULUS packs a range of features. John says, "It records video of everything you see in the scope and if you put on your best Marlin Perkins voice, you can record the exact moment live as it happens. It is great for some reticle screen grabs like you see here. This scope also features an in-scope rangefinder and infrared for night vision hunting."
By the end of June 2025, John had removed 620 iguanas in just six months—hundreds more than the same time the previous year.
Accuracy is critical for John, whose typical shooting range is between 15 and 50 yards. He explains, "Accuracy is also improtant for iguanas. Body shots rarely stop them, even head shots are often absorbed and they keep going. You pretty much must hit a dime spot in order to bring them down with a single shot." Iguanas are expert hiders. When perched in trees, finding them is only half the battle. Branches deflect pellets, and their tough, scaly skin makes them hard to kill. If the first shot misses, the iguana usually escapes into the brush, water, or worse—into a burrow to breed again.
Thanks to the ZULUS HD's exceptional clarity, John captures every detail, ensuring each shot is as accurate as possible. The built-in rangefinder offers real-time distance feedback, allowing for precise drop compensation. John also loves the video recording feature, which helps him review his shots to refine his technique, document his hunts, or ensure he complies with state guidelines.
Still, one of the biggest challenges remains locating iguanas in dense foliage. Recently, the DNT ThermNight caught John's attention. With advanced thermal imaging, it could help him spot iguanas more effectively in dense foliage or low-light conditions, whether in trees or on the ground. It could be the tool he needs to track these elusive creatures more efficiently.
John's mission is far from over—and neither is ours. As he strives to keep Florida's ecosystem in check, DNT is right there with the right gear.
Unlock your potential with the ZULUS HD and ThermNight series.
When the Hydra thermal scope launched with its 3-in-1 design, many were skeptical. Could one thermal imaging device really deliver handheld, standalone, and clip-on performance without breaking the bank? Turns out, it can. But don't just take our word for it. Hear what real users have to say.
Handheld Mode: Clear Views, Easy Portability
Many users appreciate the Hydra scopes' portability and clarity. Jerry Mitchell shares his satisfaction with HS635, "Purchased this to use as a handheld to pair with my ZULUS LRF. Makes for a great combo and I don't have to be on my gun all evening. The clarity and functionality is really fantastic."
Likewise, Derek Tipple highlights HS635's compactness: "Mostly as a handheld monocular, it's worked great. It's lightweight and compact without the mount... I've observed deer out to 900 yards… Clarity is as advertised."
The HS325 model also stands out for handheld use. Ezra Miller notes, "By far the best entry level thermal I've ever tried out. Does phenomenal in all three roles of handheld, clip-on, and standalone scope!" L.M. adds, "I use my HS325 as a spotter for hunting coyotes. Works great and has excellent clarity. Using the Hydra as a spotter and the ZULUS to shoot is a deadly combination."
HS225 users also appreciate its handheld convenience. Rolyn Smith praises, "Fits in my hand great for using it as a handheld." Jon Janica adds, "Much better than I expected, excellent clarity. Bought this to use as a spotting device... Has better clarity than my thermal that cost $3000.00."
Standalone Scope: Effortless Precision, Exceptional Value
Mounted on rifles as standalone scopes, Hydra devices continue to impress. After trying HS635 in the field, Brian Heard recommends, "Excellent performance and an outstanding value considering the price point. Note I have not used it in clip-on mode, only as a handheld spotter and a thermal scope. Zeroing was literally a one shot process."
For those comparing Hydra to its competitors, Spencer Beal states, "My basic HS635 package had everything needed to get up and running and mounted on my 6.8 SPC. The last optic I purchased five years ago was for $5,000. The HS635 is leaps and bounds better for 1/2 the price."
The HS325 model also shines in standalone mode. Kyle Whisker remarks, "I'm very impressed at the value and versatility. I have it sighted in as an optic for one rifle and as a clip-on for another. It's also very handy to use as a scanner. Image quality is impressive for 384."
Marcus Harrison, an HS225 user, shares the same feeling, saying, "This is a great optic as a standalone and paired with my ZULUS 3-12. I could not be more happy with it."
Clip-On Mode: Smooth Mounting, Seamless Performance
One of Hydra's biggest strengths is its ability to convert into a clip-on, without adding weight or disrupting zero.
Regarding HS635, J.L. appreciates the mode-switching convenience. He comments, "...Most importantly was the option for me to use it as a clip-on (my preferred use)... The fact you can save different "zeros" for different set ups is excellent, and they understand the difference between zero for a clip-on and zero for use as a scope, this is extremely important!"
HS325 also excels in clip-on mode. Brady Nunn compliments, "Really great optic, pairs extremely well with my LPVO set up… smooth transition between color schemes, easy to set up and run on the app…" Veteran user TEM also praises its military-level quality and versatility, saying, "I've used thermals for the last 30 years and the Hydra HS325 is comparable in quality to the military thermals but multi-functional. I'm currently using it in the forward position of my optics. Clear and concise picture. Great thermal."
HS225 proves just as capable in clip-on mode. Mikel Estes finds it useful for hunting, saying, "Scope works well. Easy to zero and use as a clip-on addition for my LPVO while hog hunting."
Real-World Ready: Unleash the Power of Hydra 3-in-1
All these prove that the Hydra 3-in-1 concept is not hype, but truly works. From hunters to military veterans, users value Hydra's clear, sharp imaging and effortless portability, combined with reliable accuracy and quick, easy mounting. Its versatile design fits handheld, standalone, and clip-on roles perfectly, delivering dependable performance and convenience in any situation.
Hydra HS635 Imaging Modes
Ready to elevate your thermal game? Explore the Hydra series today and see the difference for yourself.
Since its launch, the Hydra series has redefined what's possible in thermal optics. Its innovative 3-in-1 multi-function design adapts to any situation: as a standalone thermal scope, a clip-on for daytime optics, or a handheld monocular.
The Hydra line includes three models: HS225, HS325, and HS635. We'll highlight their shared features and key differences to match you with the right one.
Key Features Shared by All Hydra Models
1.CNC-Machined Aircraft-Grade Aluminum Body
Crafted from a single block of 6061 aircraft-grade aluminum, the Hydra series is highly durable and built to withstand tough field conditions.
2.High-End Thermal Sensor + AI Super Resolution Algorithm
Equipped with a 12μm uncooled infrared sensor boasting a 50fps frame rate, the scopes capture ultra-clear thermal images. The DNT's proprietary Super Resolution algorithm ensures that zoomed-in images remain sharp, providing exceptional clarity at long distances.
*With our Super Resolution algorithm, a 256-sensor image looks as clear as a standard 384.
*Our Super Resolution algorithm makes digital zoom clearer and sharper than you've ever seen.
3.High-Resolution Micro-OLED Display
Each model features a crisp 1024×768 micro-OLED display, providing vivid, clear images and a comfortable viewing experience.
4.Highly Forgiving Eye Box
With a generous 2.5" (65 mm) eye relief and a wide eye box, users enjoy comfortable viewing without black edges or loss of field of view.
5.Compatibility with LPVO and Prism Optics
Hydra scopes clip on effortlessly to Low Power Variable Optics (LPVO) and prism scopes, allowing quick switching between thermal and daytime views.
6.Lightweight & Ergonomic
Weighing only 13.7 oz (389 g) at the heaviest, these scopes offer balanced ergonomics and portability, ensuring fatigue-free handling.
7.Interchangeable 18650 Battery Power
Powered by recharable flat-top 18650 batteries, providing stable and long-lasting runtimes. Plus, all models support 5V USB Type C external power supply for extended use.
8.32GB Built-in Storage
Each model comes with 32GB of built-in storage, allowing you to save footage, images, and data without needing additional memory cards.
9.IP67 Waterproof & Recoil Resistant
Built for harsh environments with IP67 waterproofing and recoil resistance up to .50 BMG / 800Gs, all models are ready for demanding conditions.
10.DNT Optics App Integration
With the dedicated DNT Optics app, you can enjoy live streaming, media sharing, and other smart features, enhancing your shooting and scouting experience.
Differences Between HS225, HS325, and HS635
In the model names, HS225, HS325, and HS635, the first digits indicate the resolution, while the last two digits represent the focal length of Objective Lens.
What These Specs Mean:
1.Resolution:
HS225 (256×192): Ideal for general, close-range use, where high detail isn't as critical.
HS325 (384×288): A balanced option, offering improved clarity for mid-range applications.
HS635 (640×512): Best for long-range use, providing exceptional detail for distant targets.
2.NETD (Noise Equivalent Temperature Difference):
HS225 (≤25mk): Standard thermal sensitivity for general use.
HS325 & HS635 (≤18mk): Higher sensitivity, detecting smaller temperature differences for clearer thermal images.
3.Focal Length of Objective Lens:
HS225 & HS325 (25mm): Ideal for close to medium-range observations.
HS635 (35mm): Wider field of view, suited for long-range detection.
4.Base Magnification & Digital Zoom:
HS225: The 3x base magnification is perfect for short to mid-range observations, with digital zoom up to 12x for added versatility.
HS325: A 2x base magnification provides a wider field of view, and digital zoom up to 8x allows for detailed observations at medium-range distances.
HS635: The 1.5x base magnification pairs well with long-focus optics, with digital zoom up to 6x to bring distant targets into sharp focus, ideal for professional-grade, long-range use.
5.Weight & Operating Time:
HS225: Weighing just 13.1 oz with 5.5 hours of battery life, it's perfect for portability. When including the mount, battery, and eye cup, its total weight is approximately 19.6 oz.
HS325: Offering balanced performance at 13.4 oz and 4.5 hours of battery life. With the mount, battery, and eye cup, the overall weight comes to about 19.9 oz.
HS635: Slightly heavier at 13.7 oz, with 4 hours of battery life, ideal for long-range use. Including the mount, battery, and eye cup, the total weight is roughly 20.2 oz.
Pricing and Discounts
Now that you've explored the key features and differences, we're confident you've found the perfect model for your needs. Here's some good news for you: use the code SAVE10 at checkout to enjoy an exclusive 10% discount on any Hydra model!
Still Not Sure Which Hydra Model to Choose?
Try our Product Finder for a personalized recommendation or contact our team (info@dntoptics.com) for expert advice.
Explore the Hydra series now. Your perfect match scope awaits you!
Author: Nicholas C
Whether you are a customer first setting up your DNT Optics digital scope or someone who is curious how our One-Shot Zero works, we will go into detail how you can perform a One-Shot Zero so you can save time and ammo allowing you to focus on other matters like preparing for your hunt.
What Is One-Shot Zero?
The DNT Optics One-Shot Zero is a tool in our digital scopes to help you zero the reticle for your weapon of choice. It does not matter if you are using an airgun, firearm or a crossbow. The One-Shot Zero is performed the same. First let us manage your expectations. The One-Shot Zero is fast but may require more than a single shot depending on your weapon and projectile of choice. Under ideal scenarios you can zero your reticle with a single shot fired. But let us be realistic, it might take a couple more. However here are some tips to help set you up for success.
Preparation Tips Before Zeroing
Make sure your DNT Optics scope is installed correctly and the screws are properly torqued. When you are ready to zero your DNT Optics digital scope of choice, go to a range where you can shoot safely. Turn on your DNT Optics scope and make sure you are at base magnification. This will make it easier to see your projectile impact and later we will zoom in to dial in the reticle position.
Zeroing with ZULUS V1
We will start with the ZULUS V1. Once you are setup, press the menu button and hold it down to enter the settings menu. Press the RIGHT button to move over to “Zero Reticle”. Press the up (video record) button to go into that setting. Once you are in the ZULUS V1 Zero Reticle menu, you will see a white bar at the bottom of the screen.
ZULUS V1 Zero Reticle Menu
From left to right: Current magnification level (you cannot adjust this here), Zero Profile, X position, Y position, Reticle Style, Reticle Color.
A letter will be highlighted in teal, this is the zero profile you are currently adjusting. You can change the zero profile from A to Z. You can store up to 26 different zero profiles. Pushing the LEFT or RIGHT buttons will cycle through the different options you can adjust.
While aiming your scope, shoot at something that will allow you to see your projectile’s impact. Some people like to shoot at a dirt backstop to make it easier to see the projectile’s impact. This is helpful if your shot is off paper. If you can see where the projectile impacted then aim the scope back to your original point of aim. While carefully holding the gun, as steady as possible, lightly press the POWER button on the ZULUS V1. This will freeze the image in the scope. Once the image is frozen, you can relax and you do not have to hold your gun steady anymore. While looking into the ZULUS V1, move over to the X=0 setting. Push the up or down arrow to adjust the X value. Pressing UP will increase the value moving the reticle to the right while pressing DOWN will decrease it and move the reticle to the left. Move the reticle over to where your projectile impact was. Now press the RIGHT button to move over to the next adjustment and you can adjust the Y value. Pressing the UP button will move the reticle up increasing the Y value and pressing the DOWN button will lower the reticle as well as the Y value. Pressing and holding the UP or DOWN buttons will move the reticle faster.
Once your reticle is where your projectile had landed, you can lightly press the POWER button once more to unfreeze the image. Take another shot to confirm your zero. If you want to dial in the reticle position, long press the LEFT key to save and exit. If you long press the RIGHT key, you will exit without saving. Exit out of the settings menu entirely and zoom in with the scroll wheel. Now go back into the settings menu and then the Zero Reticle menu. Here you can take another shot at full magnification to see how well you zeroed your reticle. If you need to readjust the reticle position, then repeat the steps above. You don’t have to shoot at dirt anymore. Depending on your zero distance, you may be able to see impact on paper.
Zeroing with TNC225R
The ThermNight TNC225R settings menu is a bit different from the ZULUS V1. It is a vertical list that you cycle through with the UP and DOWN buttons. Press RIGHT to enter that setting. The “Zeroing” menu is similar to the ZULUS V1 but with the option to switch between digital and thermal channels.
TNC225R Zeroing Menu
Just like the ZULUS V1, pressing RIGHT or LEFT will cycle through the different Zeroing menu options in the TNC225R. Pressing UP or DOWN will change the highlighted option. Unlike the ZULUS V1, the TNC225R only has five zero profiles, A to E. We recommend zeroing the digital reticle first. Just like the ZULUS V1, start at base magnification and move the reticle to your point of impact. Hold the RIGHT button to save and exit. Holding the LEFT button will exit without saving. Once you save and exit, a window will pop up asking if you want to switch to another mode.
TNC225R Pop-up Window
CANCEL will be highlighted. Press UP to switch to OK. Once OK is highlighted, press DOWN to go back to CANCEL. Press RIGHT to choose either option. Pressing LEFT will exit this screen. Pressing LEFT again will exit the settings menu completely. If you want to continue to zero the thermal reticle, switch back to DIGITAL if you are still in the Zeroing menu. If you exited the Zeroing menu, go back in. Now point the reticle at something obvious that you can see in THERMAL. The corner of your target stand is a good example. While holding your scope steady, quickly press the POWER button to freeze the image. Now highlight DIGITAL and press UP or DOWN to switch to THERMAL. The image will still be frozen and now you just need to move the X and Y of the thermal reticle to the same corner your digital reticle was aimed at. Once zeroed, unfreeze by pressing the POWER button quickly and take another shot to confirm your zero.
Zeroing with Hydra, TNC335R, TNC635R, or ZULUS V2
Zeroing our newer digital scopes like the Hydra, TNC335R, TNC635R or ZULUS V2 is even easier with their new settings menu.
ZULUS V2 Menu
The new settings menu is an evolution of the TNC225R menu system and was designed to be more intuitive. Press up or down to cycle through the options. Press RIGHT to go into the desired setting of your choice. Once you are in a setting, press UP and DOWN to cycle through the options and press RIGHT to choose an option. Press LEFT to go back and exit the option you are in. Keep pressing LEFT to exit the settings menu.
ZULUS V2 Zeroing Menu
In the Zeroing option you will see a box with 6 options. (Post photo of this menu). You start off highlighting the Zero Profile box in yellow. Pressing RIGHT will change this option, you have ten zero profiles to choose from. Press DOWN to highlight the Freeze option. You can lightly press the POWER button to freeze the image as well. Move down to the X and Y numbers to alter them. Pressing RIGHT increases their respective values, while pressing LEFT will decrease them. Move down to SAVE and press RIGHT to save and exit. Or move down to EXIT to exit without saving.
Just like the TNC225R, the TNC335R and TNC635R has the option to switch from digital to thermal in the Zeroing Menu. If you see the pop up window asking to change modes, press up to choose OK. Pressing RIGHT will choose the highlighted option. Pressing LEFT will not exit this window.
Final Tips
When you are zeroing your reticles, write down the X and Y values and save that somewhere for future reference. If your point of impact changes and your DNT Optics scope is no longer zeroed make sure you are on the same Zero Profile and at the same time you can check the X and Y values to see if they have somehow changed. In some cases, firmware updates can wipe out the zero profiles. Knowing what the numbers were will help you to re-zero your reticle.
If you need any help or have questions about our One-Shot Zero process, reach out to our customer service department (info@dntoptics.com). Our tech support are more than happy to assist over the phone or email.
We hope this guide has been helpful for you and will get you zeroed quickly so you can go out and enjoy using your DNT Optics scope.
