So, for the Raspberry Pi 3D scanner, camera, measuring device, etc.
The verdict is clear. I will be using an optical viewfinder on the
camera when I need to see what the camera sees. Now, the problem just
comes down to where to buy the part? Well, you can’t really buy a
readymade part for this purpose. Your easiest options are to scavenge
the optical viewfinder from a point-and-shoot camera or build your own
optical viewfinder. After some tough searching, after failing, with
the fist idea of searching for a readymade device, I found a great
site that has this nice lens search tool for finding precisely the
lens you need, without needing custom manufacturing. Otherwise, that
was the second best option when you need a very specific lens size and
focal length, but all else equal being plastic.
20181019/DuckDuckGo build your own plastic lens
20181019/https://digital-photography.wonderhowto.com/how-to/howto-build-your-own-camera-lenses-0118179/
20181019/https://www.diyphotography.net/build-your-own-lenses/
20181019/https://www.surplusshed.com/
BUT, beware. So I did a search on their site, and although you can
get lenses alright, there don’t appear to be any markings on the
materials of the lens. Plastic? Glass? I don’t know.
Also, there are other interesting parts on there. LCD for a Sony rear
projection TV for only $18? How, you could make a pretty spiffy
digital video projector with that! If only you could figure out the
signaling on that cable, that is.
Read on →