Back in the days of film and darkrooms I used to lug around an SLR camera. I never really called photography a hobby, so I gave it away when digital point-and-shoot cameras came out. These days I can usually take all the pictures I want with my smartphone.
The only thing I miss about SLR cameras is the ability to take photos with shallow depth of field, the ones where the background or foreground is blurred. You need a macro or zoom lens to do that, and smartphones don't have them. My Samsung S5 camera has a feature called Selective Focus that tries to achieve the effect using multiple shots and software tricks, but it's very finicky. I can also reproduce the effect by processing the digital image with an app, but it takes a lot of work for the result not to look fake. The other option is fit my phone with a Sony QX lens, but that costs as much as a professional camera.
Some time ago I was told that it was possible to use zoom lenses on a smartphone by putting a telescope eyepiece between them. This week I finally got the chance to test the idea when I found a used nonworking DSLR lens for $10. As I try to demonstrate in this project, for the fraction of the price of a point-and-shoot you can vastly improve the power of your smartphone camera and rescue a fully functioning but obsolete piece of precision technology from destruction.
Comments and tips from the more knowledgeable will be appreciated!