Here’s an easy project to make use of an old viewfinder camera you might have lying around. The big viewing windows on cameras like Rolleiflexes and Seagulls provide enough light to capture using a digital camera — and you can rig one up just using a Pringles can and a little elbow grease. Works best with a macro or telescopic lens, it looks like.
The result may not replicate the incredible definition of these medium-format cameras, but it will capture the amazing look provided by the viewfinder window. More instructions can be found at Make.