letsbuildacamera
Member
Thorlabs' BK5 is out of stock, and I can't find anything suitable that's both light tight and thin enough.
I built a bellows for a Welta Weltur some 20 years ago with the interior of a film changing bag and a, get this, Trader Joe paper grocery bag. Still works....Anyone tried the inner bag material of a film changing bag? This is a rubberized fabric. I've used it for the inner taking lens light trap bellows on Rolleiflexes and it has done well. But I've never tried it for a full external bellows.
Nylon is very difficult to glue successfully. It's like polyethylene and polypropylene in that it's a low surface energy molecule, so when gluing nylon it usually needs to be "activated", by either ion bombardment or flame activation.
Hopefully it isn't a problem, but be aware of that with your nylon ripstop.
'm told this stuff works pretty well:
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