I recently purchased a tiny Minolta MG 16mm camera. Although it takes some interesting tiny pictures and is very easy to carry around and snap off pictures with compared to my 5 x 7, I have discovered an even better use for this camera.
I found the focal length to format aspect on this camera to be very good for me so I did some calculations and learned that if I use a 240mm lens on my 5 x 7 it would have the same aspect. I obtained that lens for my camera and now pop the Minolta in my pocket and use it as a range finder while composing photos with the 5 x 7!
Saves set up time to wander around with the mini until I get it just right. The picture on both cameras is identical except for quality!