54mm male to 58mm female lens cap filter flash adapter ring

thingiverse

I recently acquired a Canon 100mm USM MACRO lens that came with a 58mm lens cap thread, while my ring flash features a largest 54mm thread. To ensure compatibility, I created a custom adapter by designing a 58mm diameter cylinder in Blender using the software's subtractive modeling tool. I then exported the design to be printed and used my printer to produce the part. However, due to its limitations, the print required some post-processing work. Using a Dremel rotary tool, I carefully filed down both sides of the adapter to achieve a precise fit between the lens cap thread and the ring flash's 54mm thread.