Are you using a ramp? (The Ramp is a 2X2 with dark material on the outer edges. On the center I use 1-2 pieces of cardboard) That will help get a better view into the ocular:

I have my setup with the light as 12:00 and the ramps widest part at 6:00:

The light from from source, angles off the ramp into the scope. If I need to change the coins direction, I move the coin, not the ramp. The angles work great for my setup. Turning the ramp will make them darker. But at the right angles, the coin will have a golden color. Then I know I have it correct.
Edited by coop
12/14/2021 3:37 pm