Correction lens on rifle rear sight

[JiriK]

I read the new ISSF rules. Using single correcting lens mounted on the rear sight of a rifle is allowed.

So I started drawing mounting attachments so I could mount the lens and it´s holder (Knobloch) to my rifles.
Plan is to make 3D models of the mounting rings and let my friend 3D print them.

Correction I use is approx. +3 (Don´t remember exact values)
Does it matter, how far from aperture the lens is mounted?

[Pheyden]

I would place the lens 40-70 mm from the iris orifice. The eye should then be 15-20mm from the other side of the lens.

[Martin Catley]

Have you looked at the Anschutz one, very simple and you can adjust the distance from the Peep? May not take your Knoblock lense though, would need cutting to size.

[JiriK]

Thanks, I have seen that Anschutz (or something similar) being used here. I have something similar to that in mind, if the 3D print doesn´t work.

[Pheyden]

MEC glas Monocle

This is what I am using. I simply transferred the lens from my glasses, as it was the same diameter. In fact I could have simply used the holder as well, only having to re-index the actual lens.