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BlackHawk95
Reply with quote  #1 
Hey guys,

Ive got a NF 8-32 NXS scope. Ive been noticing lately that I can get setup on the target and get the scope all dialed in and can see the reticle and target very clearly then, after a few shots the whole target gets hazy. The reticle itself is still clear but not the target.

Ive adjusted the occular and the focus and it doesnt seem to help. I also dont think its mirage. theres no boiling or moving with the wind.

Im just trying to figure out if its the scope or my eyes..

Any help would be great.

Jerid
FredBohl
Reply with quote  #2 
Sounds like a similar issue that was recently discussed over on the Benchrest Central Forum - Click Here

See if that thread provides any help. Also it might stimulate more thoughtful responses if you could provide additional data such as your age, any known vision issues, typical time you look through the scope, how long between shots, and how many shots before the problem occurs
BlackHawk95
Reply with quote  #3 
Fred,

That sounds about like what Im describing.

Im 28yo and wear contacts as im nearsighted. as far as the times it happens, I usually have the ability to shoot through out the day. Morining, noonish and evening. And as far as when it happens, I can get setup and all behind the gun and get it in line with the target and fire off 3 to five rounds, then after re-loading Ill look back though the scope and see the target is blurry.

I have used the steps as described on the BC site to adjust the occular and the parralax. with no improvement in the blurryness. I thought i might be barrel heat, but its not as after 3 to 5 shots theres virtually no heat on the outside surface of the barrel. Ive even tried to look down the barrel and see if there was any mirage coming off it, and ther wasnt.

Also, I dont think its just mirage from the atmosphere. As Ive seen that before and this is not the same thing.

Only thing I can really think its is is my eyes or contacts. But I dont know what to do if it is.

Thanks,

Jerid
FredBohl
Reply with quote  #4 
Jerid,

Let us assume first that this is a problem with your visual system (eyes and/or contacts). At your age you should be at your peak visual acuity and normally your myopia (nearsightedness = more than normal corneal magnification) should be diminishing as presbyopia (decreasing focus accommodation of the eye lens with age) tends to reduce the effect of myopia.

I would suggest that you try shooting without your contact lens in the shooting eye. You will need to redo the ocular (eyepiece) focus very very carefully starting from from the full out (left most) position. The Nightforce scopes I've tried have a correction range of almost -3 to +2 diopters which should be sufficient [-3 diopters is a lot of myopia]. Then be careful to set for zero parallax error.

Let us know if that helps or at least changes the observed effect.
GermanS1
Reply with quote  #5 
Jerid, that sounds like barrel mirage. Easy enough to check, take a piece of cardboard about 3 to 4 inches wide and as long as the barrel, fire a few shots, see if the problem is there, then put the cardboard over the barrel and see if the problem is gone. If so, rig up a more permanent mirage shield.
canuck4570
Reply with quote  #6 
I had the same problem
somebody gave me that trick for my nightforce
go in a completely dark room
put the scope parallax on infinity
put the scope to highest x setting
put bikini cover on objective
light up the reticle (switch on)
now look in the eye piece and focus reticle
take your eyes away and look back and see if reticle is focus
repeat until satisfied
went shooting after doing this and behold all day no problem
hope this help Cancuck
BlackHawk95
Reply with quote  #7 
Thanks again for all the replys.

Fred, My contact perscription in my shooting eye is a -3.25 diopter..

Im actually thinking my contact is moving in my eye or drying out.

Im going to try some different things today and see if anything changes.


Jerid
jb1000br
Reply with quote  #8 
Quote:
Originally Posted by GermanS1
Jerid, that sounds like barrel mirage. Easy enough to check, take a piece of cardboard about 3 to 4 inches wide and as long as the barrel, fire a few shots, see if the problem is there, then put the cardboard over the barrel and see if the problem is gone. If so, rig up a more permanent mirage shield.


That would be my bet too German.

JB
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