Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 22, 2014 18:47:53 GMT -5
A short time back I posted that my Nikon 6x18 side focus scope broke on me...It seemed that it wouldn't hold zero and wouldn't adjust properly. I got it back today and on the repair sheet they said that they adjusted collimation.... I have a general knowledge of what collimation is (adjusting the line of sight) but have never heard of it in relationship with rifle scopes... So what's the scoop on that.
Thankws, Zen
|
|
|
|
Post by encore50a on Oct 22, 2014 19:23:59 GMT -5
I had a similar experience, also with a Nikon. I believe it has something to do with light waves and rather they are parallel. It was explained to me, that the light waves should be parallel to infinity. It appears to be an internal adjustment of the lens.
Mine worked flawlessly when returned. Nikon Monarch. |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 22, 2014 20:17:31 GMT -5
I had a similar experience, also with a Nikon. I believe it has something to do with light waves and rather they are parallel. It was explained to me, that the light waves should be parallel to infinity. It appears to be an internal adjustment of the lens.
Mine worked flawlessly when returned. Nikon Monarch. Encore 50... So what was your scope doing that caused you to send it in? Zen |
|
|
|
Post by fishhawk on Oct 22, 2014 20:53:56 GMT -5
Collimation within the scope is turning the objective (front lens) mount forward or backwards in it's threads to align it with the focal point(where the light waves converge) from the other lens in the scope. Sometimes this holder can move from vibration and shock. Collimation also refers to aligning your bore to the center of your reticle at a given distance, just basic bore sighting in a nutshell.
|
|
|
|
Post by encore50a on Oct 23, 2014 6:28:01 GMT -5
I had a similar experience, also with a Nikon. I believe it has something to do with light waves and rather they are parallel. It was explained to me, that the light waves should be parallel to infinity. It appears to be an internal adjustment of the lens.
Mine worked flawlessly when returned. Nikon Monarch. Encore 50... So what was your scope doing that caused you to send it in? Zen It just stopped grouping and wouldn't adjust properly. I sent it in to Nikon and they returned it with the same explanation. I had no clue what it meant, so I called them and asked exactly what it meant. A tech there was the one that explained that it was caused by the way light passed through the scope. Its been a couple years now, but he told me that light waves are supposed to be parallel and remain parallel to infinity, although if you could see them, at a distance they would appear to merge, yet would still be the same distance apart (parallel).
To get an accurate explanation......... Call the Nikon repair shop and ask exactly what they did and for a complete explanation. Have your repair number. I looked last night for my repair sheet and must have thrown it out.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 23, 2014 8:59:06 GMT -5
Encore 50... So what was your scope doing that caused you to send it in? Zen It just stopped grouping and wouldn't adjust properly. I sent it in to Nikon and they returned it with the same explanation. I had no clue what it meant, so I called them and asked exactly what it meant. A tech there was the one that explained that it was caused by the way light passed through the scope. Its been a couple years now, but he told me that light waves are supposed to be parallel and remain parallel to infinity, although if you could see them, at a distance they would appear to merge, yet would still be the same distance apart (parallel).
To get an accurate explanation......... Call the Nikon repair shop and ask exactly what they did and for a complete explanation. Have your repair number. I looked last night for my repair sheet and must have thrown it out.
That is exactly what I was experiencing with my scope...They also stated on the repair sheet that they performed a recoil test after the repair and that it had passed... Must have been recoil related. Thanks Zen |
|
|
|
Post by cowhunter on Oct 23, 2014 12:20:03 GMT -5
Crap, your smart to figure that out. I would have blamed everything else and wasted many bullets.
|
|
|
|
Post by rossman40 on Oct 23, 2014 12:27:11 GMT -5
Collimation is the alignment of all the lenses. Don't let tech BS fool you, 99% of the time when they say "they adjusted collimation" what probly happened is you had a lens come loose. If any of the lenses come loose/shifts ahead of the retical the target image will shift in relationship to the retical. Or the optical plane shifts. It might not rattle but recoil will cause it to shift maybe every shot. Parallax adjustment is just a adjustment of the focal plane
That's one of the advantages of a FFP scope over a SFP, fewer lenses in front of the retical. Some of the fixed power military scopes were/are speced with FFP reticals just to increase reliability.
The newest trend now with tactical scopes are dual focal plane reticals (Burris has a few out now). Not really a new idea, if any of you ever played with a Shepherd scope it has dual focal plane reticles, mainly to ease adjustment but if something went wrong in the erector, you knew it right away.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 23, 2014 14:36:53 GMT -5
When Zen explained to me what Nikon said about his scope the Sheppard scope came to mind. A coo worker has one and talks highly of it but to me seems like something else that can go wrong while hunting.
Zen and I had the conversation that we thought that the side focus or objective focus might not be able to handle the recoil we are generating with these sml.
Either way hopefully the Nikon scope will last a very long time now that it is fixed.
|
|
|
|
Post by encore50a on Oct 23, 2014 14:46:26 GMT -5
Collimation is the alignment of all the lenses. Don't let tech BS fool you, 99% of the time when they say "they adjusted collimation" what probly happened is you had a lens come loose. If any of the lenses come loose/shifts ahead of the retical the target image will shift in relationship to the retical. Or the optical plane shifts. It might not rattle but recoil will cause it to shift maybe every shot. Parallax adjustment is just a adjustment of the focal plane That's one of the advantages of a FFP scope over a SFP, fewer lenses in front of the retical. Some of the fixed power military scopes were/are speced with FFP reticals just to increase reliability. The newest trend now with tactical scopes are dual focal plane reticals (Burris has a few out now). Not really a new idea, if any of you ever played with a Shepherd scope it has dual focal plane reticles, mainly to ease adjustment but if something went wrong in the erector, you knew it right away. I'd bet you're correct.. |
|
