Here are a couple:
- when you shoot a 35mm, the distance to the subject is the same as the width of the frame. Makes "hip-shooting" easy 🙂
- the height of a 35mm frame is the same as the width of a 50. For example, if you are out with your 35 only, and need a 50, shoot vertical and crop by half 🙂
- to focus fast and/or long lenses wide open, pre-focus, and do final focusing by moving.
- when it's dark, for people shooting, forget about your meter, shoot as slow and wide open as you can. Worry about exposure later.
Cheers,
Roland.