Bahtinov mask 50-600mm+ - with screws to adjust to different lenses

I designed and tested this bahtinow mask with lenses from 50mm up to 600mm. With 50mm you still can see the refraction because of the extra fine gaps.
Outer diameter ~ 60-100mm will work well.
The two screws allow you to adjust it to the lens' outer diameter and "hang" it onto the lens - relying on it pointing upwards ;)
Toolless design, you need additionally

• 2 x M3 screw, 10mm length, with hex head and
• 2 x M3 hex nut.

Print the nut .stl twice and press the hex nuts into it. Screw on the mask so that the sunken part holds the hex head of the screw so it can't turn.
Now to adjust simply loosed the nut a bit, slide into position, tighten.

Printing with PETG and .4 nozzle worked well for me.