I have been reading a bit online in regards to problems with the Sputnik cameras. One of the main issues is the highly reflective shiny black plastic inside the camera. I guess light entering through the lens bounces around quite a bit causing fogging and contrast issues. One fix lots of photographers due is adding a sticky dull flocking material to the camera interior. I bought some last night on eBay and will add it to my camera before shooting. I might also have to figure out some kind of lens hood system and work on the seals at the back of the camera to prevent fogging form that end.
Here is the stuff I bought online last night. I paid $8 USD with free shipping.
Black Velvet Flocking Material
Here is the stuff I bought online last night. I paid $8 USD with free shipping.
Black Velvet Flocking Material