Actually, I'd be suprized if no-one has ever done this, but I'm so excited about this I wanted to share it with you guys...
After a few prototypes I've arrived at a foolproof solution for remembering that the lens cap is STILL on the front of the camera.
Originally I just bolted a red piece of plastic on the lens cap that could be seen through the main viewfinder, but I get so excited and focused (no pun intended) on the subject matter that it still wasn't enough.
I had to find a way to disable the camera. I realized that if I blocked the focusing portion of the viewfinder with the red plastic, the camera can't focus!(DUH) An unintended effect which is really cool is that the red plastic leaves a red square when you look through the viewfinder. And if I'm still too excited about a particular photo op, the camera not focusing is always enough to make me stop and remember the lens cap is still on.
Yes, I know it looks silly, but I promise you, IT WORKS. When I find just the right material, (ideally a sandwich of black and red plastic so that it doesn't look so obnoxious from the front of the camera) I'm going to make one for my Polaroid 600 SE and even my Yashica Electro GX
See photos here : http://www.rangefinderforum.com/foru...ad.php?t=61894
hoping this message finds you well -Ian