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Newbie here, I've got two questions:
1. is there a formula for what the apparent focal length would be if I were to use a full frame lens on a cropped sensor camera? anything else I should know about using FX lenses on DX cameras?
2. From what I understand a 50mm 1.8f lens is the quintessential portrait lens to start out with, but would it serve me well for other stuff in general? I want to graduate from my kit lens and this is about the focal length I use most of the time anyway, but I haven't really found my niche yet.
