Lens reducer

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Lens reducer

Post by dronning on 4/4/2018, 10:28 pm

I remember an earlier discussion on reducing the field of view of the DOT by installing a reduced size insert of some kind, maybe only for slow fire??  The match rifle guys are using this, it puts a  “ghost ring” by using a chamfer around the center hole but is clear outside of the chamfer so you can peek at the numbers of the targets next to you.
- Dave
 
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Re: Lens reducer

Post by LenV on 4/4/2018, 10:41 pm

What scope does it fit?

Len
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Re: Lens reducer

Post by dronning on 4/4/2018, 10:51 pm

LenV wrote:What scope does it fit?

Len
All March rifle scopes it's threaded M37 x 0.75
- Dave
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Re: Lens reducer

Post by Amati on 4/5/2018, 12:24 am

March doesn't list it but it is available here:

https://www.whiteoakarmament.com/white-oak-lens-reducer.html

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Re: Lens reducer

Post by Jon Math on 4/5/2018, 7:59 am

That’s an insert for a globe front sight isn’t it?  Rifle shooters typically use an adjustable iris in their rear sight, and either an adjustable one in the front globe or inserts like those to get the best sight picture depending on lighting and distances shot. 
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Re: Lens reducer

Post by dronning on 4/5/2018, 8:19 am

Jon Math wrote:That’s an insert for a globe front sight isn’t it?  Rifle shooters typically use an adjustable iris in their rear sight, and either an adjustable one in the front globe or inserts like those to get the best sight picture depending on lighting and distances shot. 

Jon,
No it is for the eyepiece end of a scope, check out link above for pics.  There have been some rule changes for HighPower Matches allowing optical sights/scopes up to 4.5x I believe.


"Our unique “ghost ring” design is a lens with a chamfer around the center hole. It ships with two lenses, a clear and a smoke tinted. Both are transparent which allows you a full field of view so you can still see surrounding targets and target numbers but acts as a ghost ring centering your eye in the 3/64 diameter hole."
- Dave


Last edited by dronning on 4/5/2018, 8:39 am; edited 1 time in total
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Re: Lens reducer

Post by Aprilian on 4/5/2018, 8:33 am

I played with using an archery stick-on reticle on my Matchdot 2.  I found that the extra amount of alignment was not helping me (as a beginning shooter).  With the limited parallax of the Matchdot, I didn't feel it helped my alignment.

Dave,  I have more of the reticles, you're welcome to a couple to play with.  They are a light gray frosting and I just peeled off the radial arms, leaving the center circle - like your image.  http://www.lancasterarchery.com/gunstar-funnel-lens-decal-small.html
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Re: Lens reducer

Post by Tim:H11 on 4/5/2018, 8:43 am

I saw some red dots on a pair of guns once where somone had covered the front of the red dot with black construction paper or tape perhaps and used 38 special brass as a hole punch and cut a hole in the covering material to reduce the field of view. Probably need to do some measuring to keep everything centered but it was a neat trick.
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Re: Lens reducer

Post by Jon Math on 4/5/2018, 8:56 am

dronning wrote:
Jon Math wrote:That’s an insert for a globe front sight isn’t it?  Rifle shooters typically use an adjustable iris in their rear sight, and either an adjustable one in the front globe or inserts like those to get the best sight picture depending on lighting and distances shot. 

Jon,
No it is for the eyepiece end of a scope, check out link above for pics.  There have been some rule changes for HighPower Matches allowing optical sights/scopes up to 4.5x I believe.


"Our unique “ghost ring” design is a lens with a chamfer around the center hole. It ships with two lenses, a clear and a smoke tinted. Both are transparent which allows you a full field of view so you can still see surrounding targets and target numbers but acts as a ghost ring centering your eye in the 3/64 diameter hole."
- Dave

I see.  In a photo it looked just like a front sight insert.  I’m not sure that would be much help to a pistol shooter but my eyes are getting to the point that I need to start thinking about  such things.

Thanks!
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Re: Lens reducer

Post by LenV on 4/5/2018, 10:26 am

I was/am interested in this because I wonder if it could be used to eliminate parallax. The biggest difference IMO between a 600.00 scope and a 30.00 scope is parallax. If you had to line up the dot the target and the opening you might eliminate the problem. What they need to make is a cheap sticker you can peel off the front lens to test different scopes. Hmm. Now I am thinking about note book ring binder savers..

They are actually called reinforcement labels.



Or clear...
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Re: Lens reducer

Post by Toz35m on 4/5/2018, 11:04 am

I think you would need an iris on your shooting glasses so both it at the target would be in focus.  To make this work with a dot it would need to adjust with the dot for POI.

It looks like this is mounted close to the shooters eye vs at arms length.
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Re: Lens reducer

Post by Wobbley on 4/5/2018, 11:06 am

We used to call these “paper a**holes”. lol!
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Re: Lens reducer

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