FreeRollei 35AF 43mm Filter Adapter
Printables
17 model
Free
Free35.5mm filter to 58mm filter adapter
Printables
FreeFilter Tool for Tap/Faucet Aerator (Perlator)
Printables
FreeAeropress Filter Holder with thread
Thingiverse
FreeBokeh Filter Holder for 52mm Lens Filter Thread
Thingiverse
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FreeCamera filter adapter 46mm-52mm
Cults3D
Free62mm Camera Filter Thread Extension Tube (M62x0,75)
Printables
FreeScrewable Filament Dust Filter (Easy to Print Thread)
Thingiverse
FreeSolar / Creative Filter (35mm + 55mm)
Printables
FreeMacro Photography - RMS Microscope Thread to 52mm Filter Thread Adapter
Printables
FreeLaowa bayonet to 43mm camera lens filter thread adaptor
Printables
FreeRED 300mm T2.9 - 112mm filter thread to 114mm OD clamp on mattebox adapter
Printables
FreeAF Nikkor 24 rim protector with 52mm filter thread v3
Printables
FreeGopro Session frame with 52mm filter thread
Printables
FreeBahtinov Masks for Cameras, filter thread clip-in (77mm and 82mm)
Printables
FreeThread adapters M42 : T2, camera filter 52mm 55mm 58mm
Printables
FreePop shield clamp
Printables