DIY Optical Viewfinder 35mm

thingiverse

This is an optical viewfinder meant for use on rangefinder cameras like Leicas, FEDs or Zorkies when employing wide angle lenses such as Zeiss Biogon or Russian Jupiter-12 lenses. Unlike the built-in viewfinder of your FED or Leica, which is made for 50mm lenses, this viewfinder should provide you with the correct angle of view for 35 mm wide-angle lenses. It may also be useful on a digital camera when you can't or don't want to use the screen. The viewfinder will fit onto the standard hot- or coldshoe of most cameras. You will need: - Top and bottom of the viewfinder housing printed at high resolution - A single-use camera like this one: https://www.dm.de/paradies-einwegkamera-iso-400-27-bilder-p4010355787873.html - Glue Here's how it works: 1. Once the two parts of the housing are printed, extract the two lenses from the single-use camera. 2. Fit the lenses into the housing with their curved sides facing each other. You may need to file or sand them to fit properly. 3. Clean everything and glue the two parts of the viewfinder together. Design notes: The single-use camera was gutted to get the lenses, which were carefully measured and positioned at a precise distance. The viewfinder body was designed in AutoCAD with an excessive use of polylines. PS: Sorry for the poor photos - they were taken with a cellphone camera