Quote Originally Posted by RobinC View Post
Hi Bob

I shot ten metre running boar (Running rat) quite seriously many years back, Now PC incorrect, and now just moving target, we had the same problem getting scopes generally set for 100 mts correct at 10 mts.

Don't mess about trying to adjust the lens its a real hassle, what we did was go to a local lens maker/optician, you need a +0.1 dioptre lens added to the front, the tolerance on plain lenses is 0.1 of a dioptre, which is what you need, if you have a friendly one he will sort and test his plain lenses until he finds one on 0.1.
Get it ground to the correct diameter, then pop out the front ring put an "o" ring either side of the lens and pop the ring back. Voile, corrected to ten metres, and easy to take out to return scope to standard.

Have Fun
Robin
That’s another good idea - and one that you have used with 10 metres competition shooting - so it obviously works well.

I also like the idea of being able to keep the one lens that could possibly be used in other scopes of the same size - but at around £15 for a lens ( assuming a similar price as a shooting spectacle lens) that may not be as important as being able to return the scope to original spec just by removing the “O” rings.

I have a couple of non AO scopes that are probably not worth much these days, so I can experiment with them and see what works best.

A scope with a really solid front lens holder may not adjust so a “drop-in” additional correction lens would cover that sinario too!