Thomas:(posted 8648 days ago)For personal work you can crop to any format you want. But, when you are shooting for reproduction, you have to crop to the aspect ratio of the space your image must fit into. Otherwise, your image won't be reproducable without cropping and further cropping might make the image unusable. This is just a matter of fact and is true for both editorial and commercial work. If you are shooting on assignment, you must determine in advance if there is a particular aspect ration that you must work within, or else you might not get paid for your work.