Camera Lens Filter Case - 72mm - fully configurable

This is a parameterized/configurable case for camera lens filters.

The design goals were the following:

• sturdy and robust, so that the potentially expensive filter is properly protected
• ergonomic, easy to grab, hold and handle
• secure locking mechanism, but should be easily opened and closed without much fiddling
• easy insertion and removal of filter, with one hand and a secure grip but without a big risk of touching the filter surface
• lightweight, as I would have to carry it around most of the time in my camera bag
• no additional, non-printed parts (like magnets or the like)
• easy to print

This design attempts to achieve all these goals.
The top part (lid) screws tightly onto the bottom with a simple 40° twist and can be inserted in any of four possible positions, so you don't have to fiddle for a long time to get the threads to catch.

How to print with PrusaSlicer

• load both parts and orient them with their large, flat outsides on the print bed
• let PrusaSlicer arrange them automatically
• PLA
• 0.10mm DETAIL
• 100% infill
• no support required (the “detected print stability issues” can be ignored)
• no post-print work required, the model should be directly usable

On my MK3S these settings for the default 72mm case result in a print time of about 4 hours and produce a case that weighs about 30 grams.

How to configure

• get a free onshape account (if you haven't already)
• clone the model into your workspace
• in the “Configurations” panel on the top left change to Filter Outer Diameter, Filter Height, Text 1 and Text 2 to your needs (leave Thread Pitch and Thread Shift as is, at least initially)
• Export the two parts (Bottom and Top) by right-clicking each and selecting “Export” from the pop-up menu (you don't need to change the export settings)
• Slice with PrusaSlicer as above

In my tests I found that adding 0.5mm to the measured Filter Outer Diameter and Filter Height worked best.