Parallax Adjuster Ring Helper

thingiverse

This is an accessory ring tailored specifically for my Nikko Sterling telescopic sight, which I've mounted on my air rifle. It's engineered to complement my 50mm AO Objective lens. The design calls for ABS material, although PLA could potentially work just as well - at least, that's a theoretical possibility. My own print turned out to be quite snug, but previous versions had the opposite issue: they were too loose. If you're having trouble with fit, you may need to use some sandpaper to smooth out the edges of the radii, depending on how accurately your printer is calibrated.