To clean such a smudge off can be an extremely tiring exercise. Since you can't get your whole finger through the lens opening, you can't really put the lens ...
Quite a while back, we got our hands on a Quad-G Wide+Macro Lens QWMA-77. This tiny lens, about the size of a thumb, is made for camera phones, such as the ...
What if you want to double expose frame 5, but not frame 1 through 4? Simple, expose frame 1 through 4 in the dark. You can do this in a window-less bathroom at ...