Choosing the right focal length for your photography is a crucial part of the creative process... we explain all!

For example, my 8-inch SCT has a focal length of 2,032 mm. Imagine it like an enormous 2,000mm camera lens! This number can also be expressed via focal ratio, or f-number.

Lenses of different focal lengths can produce the same angle of view on different camera bodies depending on sensor size. For instance, on an APS-C camera, 35mm is roughly the same as 50mm on a ...

That's all you have to do. Now pressing the 1x button will always equal 1x optical zoom. Change Default Focal Length. Apple has also added an option to change the default optical zoom setting ...