Quote Originally Posted by E.Jensen View Post
Let me rephrase that last question so it makes more sense to me, if f/11 and 1/125th of a second is the correct exposure for a 35mm piece of film, if i were to put that piece of film into a 4x5 camera(i know it will only be part of the frame) and set the 4x5 to f/11 and 1/125th of a second, removing all other variables, the film should be exposed exactly the same in both cameras, correct?
Correct. The "f" numbers are a ratio, as a means of setting exposure they are independant of format size and focal length.
But, using a DSLR as a meter is a kludge at best. Treat yourself to a decent handheld meter, it need not cost more than $50. You won't regret it, I promise you.