Questions About Nightforce F1 5-25x56

[Stormin_67]

Purchased a new NF F1 5-25x56 and took it out to set my zero yesterday. It zeroed easy but in the process of dialing it in, noticed my shooting eye started to bother me after a bit, felt like I was straining to use it when magnified 25x. I didn't notice it on the lower magnification settings. I tried to set the diopter but it was hard to tell what was best, hoping that the diopter setting is my problem?Guessing my shooting eye is around 20/40. Does anyone have an idea why my eye is under strain and what is the best way to set the diopter, is there a preferred magnification, distance, or an ideal object to view while setting it? Additionally, how much movement should I expect to move the eye piece to correct for my vision, 1/4, 1/2, turn, etc??? I was shooting at 100 yards prone off the ground. Thanks in advance for any input on these questions!!!!

[JMP]

If you look through the scope at 500 yards and further, does it still bother your eye?

[Stormin_67]

I have looked through it briefly out past 500 yards and didn't notice any strain but I have not shot targets at that distance or spent any time with it past 100 yards. I was actually wondering if distance could play in to the issue?


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[HK Dave]

http://www.scout.com/military/snipers-hide/forums/5511-rifle-scopes/13699075-setting-up-a-ffp-rifle-scope-a-simple-psa-on-diopters

Sounds like your diopter is incorrectly set.

[JMP]

I have looked through it briefly out past 500 yards and didn't notice any strain but I have not shot targets at that distance or spent any time with it past 100 yards. I was actually wondering if distance could play in to the issue?

Usually, it is set up incorrectly, but distance can be an issue with a rare minority of scopes that your's may be. I haven't noticed on the F1 but they might have geared the lenses more like the Hensoldt 3.5-26 to excel of extremely long ranges. The Hensoldt is set with such a fine depth of field it makes the image sensitive to parallax or diopter settings. This is done in exchange for getting superior resolution at extremely far ranges. I have noticed on the Hensoldt has a super thin reticle and the diopter is a little wonky at 100 yards where it's sensitive and even changes each time with environment at only 100 yards. The ATACR F1 seems to be a top contender for ELR scopes, so it is possible the diopter seems sensitive as it becomes a benefit at 1,000+ yards.

[Stormin_67]

Thanks Dave, good read, I had spoken to NF regarding the diopter setting before my outing and they said most do not need to adjust it and just end up screwing the settings up, guessing I am one of the exceptions. I will try and reset the diopter tomorrow following the directions to the T, and see if that fixes my problem. In the field I had forgot to set the parallax setting to infinity, hoping that was my problem. Any other input is appreciated. On a side note it shot exceptionally well after being dialed in. Went 5/5 on pennies and 1/1 on a washer at 100 yds, NF 25x really helps. Taking it to 1k range in a couple weeks.


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[FourT6and2]

1. Set mag to max
2. Set parallax to infinity
3. Look at the sky with some clouds, preferably (not the sun)
4. Adjust diopter
5. Look away and focus your eyes on the clouds to let your eye relax
6. Look back into scope and adjust diopter again
7. Repeat a few times until you're good to go

The goal is to be able to go from looking at the sky/clouds to looking through your scope such that the reticle is in focus WITHOUT having to make your eye refocus. You want a seamless shift. That's why you need to be looking at something very far away. Your eye is focused to infinity, and not straining to focus on something up close.

[Stormin_67]

Thanks everyone for the valuable input, this forum is so helpful! I will try to reset the diopter following those instructions tomorrow. I bought it for any given distance so I am hoping it's not finicky at close range.


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