Posted: 7/30/2026 12:54:12 AM EDT
[Last Edit: BigJimFish][Edited]
 Les (Jim) Fischer BigJimFish Written: May 6, 2026  Nightforce NX6 3-18x50mm F1 unboxing Table of Contents: - Background - Look and Feel - Reticle - Comparative Optical Evaluation - Mechanical Testing - Summary and Conclusion - Your Pro and Con Breakdown - Testing Methodology Background: Wow, it’s been 11 years since I last reviewed a Nightforce at the time of their SHV line launch. Since then, Nightforce has massively expanded its lineup in general and added a substantial number of first focal plane scopes when previously they had almost none. As a general rule, most of their newer scope lineups now come in both first focal plane and second focal plane variants. Most models in the NX6 line follow this pattern. Nightforce has a manufacturing facility in Orofino, Idaho that may be the most beautifully sited factory in the world, tucked up next to the Clearwater river in the northern section of the state. They make a number of the ATACR scopes at this facility. Most of the Nightforce lineup, including the whole NX6 line, is manufactured in Japan by their longtime OEM, Light Optical Works (LOW), to Nightforce-specific proprietary designs. LOW is without question the largest and most successful of the Japanese OEMs. I am not aware of Nightforce ever using any other OEM. This likely contributes to the tremendous reputation in the industry for reliability, durability, and service they have earned. They have never lent their name to lesser-manufactured products. They have also made a point of engineering their scopes with thicker tubes and generally more rugged construction than most competing scopes. The refusal to branch into lower cost scope lines with other OEMs is not the only uniqueness of Nightforce’s strategy. They also have the tightest price controls of any scope company I am aware of. Sales are almost non-existent, online retail outlets are pretty limited, and retail prices are tightly controlled. They remind me of Apple products in this regard.  The Nightforce NX6 3-18x50mm F1 on the PurePrecision SKLTN 350L and Field Optics Research Tripod at a buddies farm Look and Feel: The Nightforce NX6 3-18x50mm F1 is 13.9” in length and just 27.1oz. This is not particularly short, which I expect to help it in the optical performance testing, but it is very light. Its diminutive appearance is further accentuated by the use of a 30mm main tube and an exposed elevation turret that is much smaller than the industry norm and very much in line with the capped windage. The NX6 has all the necessary features of a tactical scope, but its appearance and weight is pure hunting. I love the versatility of crossover scopes and this one is no disappointment in features and specs: It even has a 10M close focus for rimfire use.  Nightforce NX6 3-18x50mm F1 FieldSet exposed turret close up with cap removed Clearly, the FieldSet turret is the first feature of this scope you notice and it was a big motivation for me when requesting a loaner scope for review. I have been an advocate for toolless turrets for some time and this functionally fits the bill. I should mention that the exposed FieldSet turret does not come standard on the second focal plane models in the NX6 line, but you can purchase it as a retrofit kit for conversion. The 1-6x models also do not come with this turret and cannot be converted. The function of the FieldSet turret is very unique. The top has what appears to be an inset wingnut in the middle. Once you have adjusted the scope to your rifle’s zero, you hold the turret and loosen the wingnut. Nightforce supplies a tool for this but, in practice, typically your fingers are sufficient. This nut loosens ½ revolution and stops. At this point, you can rotate the turret without clicks or movement of the scope’s internals. To set the zero stop, you push down on the turret and rotate it clockwise to the stop. You then tighten the wing nut back down to set it. This is super quick and easy. The scope comes set up to stop at exactly zero with no travel below, but there is a way - by removing the turret cap and moving a screw on its underside to a secondary location - to instead have the stop be 2 mils under the zero, if you are so inclined. Should your rifle’s zero happen to be below the current zero stop, leaving you in need of traveling below that zero, the procedure to free up travel below zero is kind of interesting. You loosen the wing nut as when setting the zero stop but then pull up on the turret (instead of pushing down) until you see the first revolution line on the stem below the turret. You then tighten the wing nut down and you will have another revolution of travel down, provided you are not pegged at max internal elevation travel. Overall, this is a fantastic turret setting mechanism that is very quick and easy in the field and functionally toolless. The turret has good feel as well. It is very easy to differentiate each individual click as well as make single clicks without the turret slipping and skipping over several clicks. The turrets aren’t particularly audible though: you probably won’t hear them with earmuffs on. That might actually be best when hunting, however. The FieldSet turret is a translating turret, meaning it will move up and down when you adjust it. Unsurprisingly, the revolution indicator is therefore on the stem of the turret. Most of the other controls on the NX6 are less unique. The capped windage is 10 mil per rev like the elevation, but without stops, and sets with the typical set screw. The power ring is smooth and has an optional throw lever stud. The NX6 has Nightforce’s typical locking diopter that almost seems between a fast focus euro style diopter and the traditional fine treaded American style in speed. The parallax is side focus, has generic lines with no distance markings, and integrates the illumination. That “Digillum” system is a little unusual. It is a single push button system where you click through the settings and has the added feature that if you hold down the button long enough it will change color between red and green. Oddly, turning it off involves holding the button almost long enough for it to switch colors but not quite. I found this totally counterintuitive and had to look up how to turn it off. Nightforce NX6 3-18x50mm F1 unboxing As for extras included with the scope, the standout is the extremely high quality scope caps. These are thick and sturdy, though they could be a little tighter on the tube becaue they tend to shift a little as you open them up. Also included is an optional throw lever stud, a lens cloth with its own self contained sack to try to keep out grit, and a unique multi-tool with most of the possible hex and torque combinations for Nightforce scopes and mounts as well as the unique wrench that fits with the FieldSet turret. You also get an entire pouch of Nightforce stickers and decals because Nightforce is smart enough to understand the value of free customer-driven advertisement. It’s a nice set of extras though notably does not include a sunshade.  Nightforce NX6 product line spec sheets Reticle: The first focal plane Nightforce NX6 3-18x50mm F1 is available in two mil and two MOA reticles. As you might expect, one of each is a tree reticle and the other dispenses with the tree section. Nightforce is very helpful to its users by including a full diagram of each reticle online, complete with all dimensions. It is far too rare for companies to do this and long ago, when I once designed a rifle scope reticle, it was quite helpful to me in visualizing what particular line widths looked like in the real world. It’s also exactly what a customer needs to know to make properly informed decisions. For the loaner scope, I chose the Mil-C F1. This is the non-tree mil reticle and features a floating dot and .2mil graduations throughout the whole crosshair. Amusingly, the vertical post is actually graduated the entire length of the post which continues to the edge of the field of view even at 3x. This must be around 60 mils and is not remotely readable at 3x. The horizontal posts are graduated 10 mils each way and labeled. The vertical post above zero is graduated 5 mils without labeling. The reticle also features a small secondary measurement section in the 4 o’clock quadrant that it is graduated in .1mil increments for fine long distance milling. Reticle thickness is probably as well calibrated as it can be, given the first focal plane nature and 6x magnification ratio. At max power it is pretty thick - as you would want for a crossover scope that you want visible when hunting in low light. At low power it is as unavoidably fine and unreadable, as you would expect, but there is really no getting around the physics of that.  Nightforce Mil-C F1 reticle illuminated red in Nightforce NX6 3-18x50mm F1 at max magnification Comparative Optical Evaluation: I’m a little bummed that the Meprolight MVO 3-18x44 returned home before the Nightforce NX6 arrived, as it just missed this scope and, being a direct competitor, would have made an interesting side-by-side comparison. Notwithstanding that, I still have quite a number of scopes to meaningfully compare the Nightforce NX6 3-18x50mm F1 to and most of them also appeared in the Meprolight MVO 3-18x44 lineup, giving me a pretty good idea how those two scopes with such similar specifications stack up relative to each other. The scopes I compared the $1.9k NX6 to side-by-side are the larger and heavier ~$1.8k Sightron S6 5-30x56, the larger but still light ~$2.2k Leupold Mark 5HD 5-25x56mm, the ~$1.5k-1.7k Leupold Mark 4HD 4.5-18x52, $1,7k Colt VMR 3-18x44, and, to a lesser extent, a significantly lower cost ~$1k Athlon Ares BTR 4.5-27x50mm I brought out near the end of my testing just to be sure. I didn’t end up doing much comparison with the Ares as the NX6 was substantially superior, as it should be at the price. Because the Colt arrived after the first test session and before I completed the review, I ended up basically fully testing the NX6 twice because it served as an obvious comparison for that scope.  The first optical test lineup, near to far: Athlon Ares BTR 4.5-27x50, Nightforce NX6 3-18x50mm F1, Leupold Mark 4HD 4.5-18x52, Leupold Mark 5HD 5-25x56, Sightron S6 5-30x56 Let’s start off with the high points such as field of view (FoV). I have created a condensed statistic for this. I call it the FoV multiplier (FoVX). The FoVX is calculated ((max power * FoV @ max mag in ft) + (min power * FoV @ min mag in ft)) / 2. This gives a number that basically averages how good the FoV of a scope is at both ends of its power range. For this statistic, the NX6 drops an excellent 118.7. This is easily the best of all the scopes in this lineup and not too far from the all-time mark of 124.5. This massive FoV is quite apparent behind the scope and really stood out relative to the other scopes in the lineup, especially the Mark 4HD which sports only a 98.8 FoVX and only 5.2’ at 18x vs. the 7.3’ of the NX6. Another area in which the NX6 excelled was its depth of field (DoF). This was unsurprising, as I have noticed that shorter, higher erector ratio scopes typically have this characteristic. The NX6 had the highest DoF in my testing and, despite that, was not actually super sensitive to parallax settings like both Leupolds are. You get less potential parallax error when you are a little off on the setting with the NX6 than with either the Mark 4 or Mark 5HD scopes, as they are both very touchy on parallax. In resolution, the Nightforce was an interesting story. At 18x, it is mid-pack; behind the Leupolds and Sightron. However, when dialed down to 10x or 5x, it gains ground and overtakes the Mark 4HD and, depending on the light conditions, can be competitive with the others as well. Its optics appear best optimized for lower magnification settings. There were a lot of areas of optical performance where the Nightforce NX6 3-18x50mm F1, was mid-pack. These were contrast, chromatic aberration, color rendition, edge-to-edge performance, stray light handling, and performance 7mil from the center of the FoV at 18x. For most of these, it was behind the Leupolds and Sightron and ahead of the Meprolight, Colt, and Athlon. In a lot of cases, the differences between most of the scopes in the lineup were also pretty minor. There was one oddity I noticed when using the NX6. At maximum magnification, head movement behind the scope brings with it a substantial barrel/pincushion distortion effect. I doubt this will be a big deal when behind a rifle, as you typically have a much more solid and stationary head position than when testing scopes in a V-block, but it is noticeable and speaks to the theme that the optical system is not best optimized for max power use in the NX6 3-18x50mm F1. Breaking it all down into my overall optical performance impressions, I would put the NX6 a little behind the Mark 5HD, and Sightron S6, quite even with the Mark 4HD despite having huge differences in which performance areas each excel at, and ahead of the Colt and Athlon on pretty much every metric. When it comes to the comparison with the Sightron and Leupold scopes, these valuations are plainly subjective. I’m valuing max power resolution more than mid power for instance. The relative values I put on FoV, edge-to-edge performance, color rendition, choromatic aberration, parallax sensitivity, and depth of field may also not be same as you would choose. In other words, it is easy to see where others could make different value judgments in ranking these three.  The optical test target through the Nightforce NX6 3-18x50mm F1 Mechanical Testing: Most scopes have some deviation from perfect adjustment magnitude, though they are doing far better now than just a few years ago. This adjustment magnitude error will vary from example to example within the same model of scope. This is because it is not a product of design errors, but rather variances introduced within manufacturing and assembly, so the performance of my test samples is a piece of information with only limited value due to representing only one example. Typically, we measure adjustment magnitude error as a percentage such that a scope whose reticle moves 10.1 mils when adjusted 10.0 mils tracks at 101% and one whose reticle moves 9.9 mils when 10.0 is dialed tracks at 99%. Having reviewed and tested quite a number of scopes from a large selection of manufacturers, I can tell you that the average deviation in adjustment magnitude from ideal is almost exactly 1%, if the two past scopes that failed tracking (and therefore can’t be linearly assessed) are not included. Reticle size deviation is close to that of adjustments at .9%. The average reticle cant measured is .07 mils in 10 mils traveled or .4 degrees.  Performing the mechanical testing on the Nightforce NX6 3-18x50mm F1 Based on what I have seen in the past from the factory Nightforce is using for this NX6 3-18x50mm F1, I expected good mechanical performance and I was not disappointed. Reticle size was absolutely spot on and, similarly, there was no measurable reticle cant. Adjustment magnitude was just 1% off, with 10.0 on the turrets reading 10.1 on the target for an Applied Ballistics sight scale factor of .99. I measured 17.2 mils up from center and 20.0 mils below for a total travel of 37.2mils. There was no tubing out or ghost movement at the extremes of elevation and windage. The windage knob turns 13.6 mils right and 12.6 mils left. There was no point-of-aim shift with diopter, power ring, or parallax, and the scope tracked properly back to zero after a box test. There was also no spline slop in the elevation adjustment, though I don’t actually think there is a spline that shifts during normal adjustment in this design. Mechanically, this scope tests quite well, better than probably 90% of the scopes I have tested. Its only slight deviation, the 1% adjustment magnitude deviation, is in the least important measurement. This will effectively disappear into a shooter’s corrected dope and never cause any missed shots for anyone. Summary and Conclusion: I love crossover scopes that have all the important features of a precision rifle scope while maintaining the size and weight necessary to be an effective hunting scope. I love them because I think hunters should be able to take advantage of the tools and techniques developed in competition to extend their effective range and because competitors can utilize the weight savings to increase their potential options when making weight for competitions with a weight limit. For a long time, the mid-priced crossover scope market has been totally dominated by the Leupold Mark 4HD and Mark 5HD offerings with little else to meaningfully compete. The NX6 line is now that competition and offers very meaningful choices in terms of both features and aspects of optical performance. The FieldSet exposed turret that is standard in the first focal plane models is a functionally toolless turret that is very quick and easy to set up and has good feel and function. Mechanically, my test scope did quite well with just a 1% deviation in adjustment magnitude, no deviation in reticle size, and no measurable reticle cant or shift in zero with parallax, power, or diopter adjustment. Its 37.2 mils of total travel measured (34.9 is the spec) is massive in such a small and light crossover scope. Optically, its strongest suits were its massive field of view and huge 6x magnification ratios. In most other areas, such as resolution, chromatic aberration, contrast, edge-to-edge performance, color rendition, and stray light handling, it is pretty mid-pack at its price point, with better performance towards the middle of its magnification range than at max power. It didn’t fall to the bottom of the pack in any area of optical performance. On balance, I found it most comparable to the Mark 4HD in overall performance, though those scopes are quite different in the areas at which they excel. Overall, the Nightforce NX6 3-18x50mm F1 has a lot going for it. Between the weight, features, and magnification range, it satisfies a tremendous number of use cases. It is mechanically sound, has a great new toolless turret design, and is where it needs to be in optical performance. We now have competition in the mid-priced crossover segment.  At 46, prone is not what I most enjoy in life, but here I am doing it with the Nightforce NX6 3-18x50mm F1 Your Pro and Con Breakdown: Pros: - Full precision rifle scope features at 27.1oz makes a great crossover option - Massive 6x magnification ratio and huge field of view - FieldSet toolless turret is easy and fast with good feel as well - Overall optical performance is about where it needs to be - Excellent Nightforce warranty and reputation Cons: - No sunshade |