Quote Originally Posted by Bill Burk View Post
The shutter lock is the feature you use when you don't want to take a picture?

I get it. Spotmatic F I've been carrying around has a lock, and it's nice that my dog doesn't take pictures as much anymore. But it also means two-steps to take a picture, possibly missing the shot.
A shutter lock isn't really neccesary. Just don't advance the film until you are ready to make a picture.
These are essential: Mirror lockup, and a simple one (like the Nikkormat FtN) that doesn't involve wasting a frame a la Nikon F. DoF preview. Pc socket(s).