Categories: all aviation Building a Biplane bicycle gadgets misc motorcycle theater
I decided to do a quick-n-dirty layout of a Korona lensboard, and figured my work might come in handy for others. I need to redo this sheet a little bit, as it's not entirely clear how things are laid out, but it's too late to modify just now. I'll post another one soon that's more illustrative, with more description on the sheet.
So, for the Google-bot: if you have a Korona (Gundlach) 5x7 view camera from the 1910s, and you need a lensboard for it, you're probably looking for this:
Lensboard plans for Korona 5x7 camera (v1) - PDF file
I plan to make mine out of plastic, probably black ABS or something similar. The 42mm hole is good for anything that is mounted on a Copal #1 shutter, such as the 210mm Schneider Symmar-S f/5.6 lens I'll be putting in mine. I'll probably make it out of two thicknesses of 1/4" plastic (since we still live in an SAE world, sad to say) glued together, with the larger piece milled down to 6mm where it matters, at the top and bottom edges. It's a .35mm difference, but it'll mean the difference between the board working and not working.
Important note: I am not an expert! I just took some measurements off my existing lensboard and stuck them into a CAD drawing. I probably got something wrong, your mileage may vary, etc.
Posted at 23:51 permanent link category: /misc
Categories: all aviation Building a Biplane bicycle gadgets misc motorcycle theater