Filter Adapter for mounting 2" M48 filters on 77mm objectives
Description
I needed an adapter to mount my 2" astronomy filters on my Samyang 135mm. The thread sizes are M48x0.75 and M77x0.75, respectively. I added tiny holes to help screw the adapter on the lens. The threads come out quite nice, the tolerance is tight obviously and you may have to play with horizontal expansion. What works best on my ender 3 V2 is a horizontal expansion of -0.05 (to adjust the M77 thread tolerance) and a hole horizontal expansion of 0.15mm for the 2" filter. Note that they add up and this gives me a 0.2 total hole expansion. It seems to be better with random seam position (this prevents having the seam defects concentrated in a single position which seemed problematic). Clear skies!
Statistics
Likes
0
Downloads
0