MT Shooter wrote:
ALL lenses are designated in 35mm film focal length terms. When mounted on any camera with a different sized sensor, the "crop factor" needs to be applied to determine its equivalent fueld of view. Yes, even lenses designed for crop sensor cameras are designated in 35mm (full frame) terms so the correct crop factor needs to be applied to them as well.
As Goofy correctly stated, just look in the viewfinder and shoot. What you see is what you will get.
. (there may be a few dumbed-down exceptions on some bridge cameras)
A 200 mm lens for a large or medium format camera will give the same field of view on a FF or crop sensor camera as a 200 designed for a full-frame or crop sensor camera.