BirdForum is the net's largest birding community dedicated to wild birds and birding, and is absolutely FREE!

Register for an account to take part in lively discussions in the forum, post your pictures in the gallery and more.

Reply to thread

Message: <blockquote data-quote="Musoman" data-source="post: 1713404" data-attributes="member: 80278">:king:If we leave out pixel sizes and stuff which come into play when you view the photo in software,  you wont see a bigger bird through the 500mm lens on the Full Frame. What you will see is a wider angle in the scene ( FOV )A Full Frame camera user can then crop the image later in software, hardly a big deal really, to acheive what the Crop Camera user would see with a 500mm lens, and who wouldnt need to crop in software later, because his crop camera is " cropping " part of the scene ( FOV ) that the Full Frame camera user can see.Because the crop camera is " cropping " the FOV that a Full Frame camera would see with the same lens, the image fills the frame on the crop cam. This then " looks bigger "  because there is no other scenic stuff around the bird.Now  if you put a 750mm lens on a Full Frame camera from the same postition you stood at when you had the 500mm lens on the Full Frame, you will get less angle scene ( FOV ), because the longer the lens, the less scene you get in the frame, yes ?Now this FOV on the FF camera with the 750mm lens has the same FOV of that the 500mm lens saw on the crop camera.Now this is what people say when they mean " a 500mm lens is equivalent to a 750mm lens on a FF camera "Its the equivalent FOV. What you havent got is a 750mm lens on the crop cam, just the angle of view ( FOV ) that the FF cam could see with a 750mm lens.Trouble is that some think they're getting the  reach of a 750mm lens. They're not.  On a 1.5 crop camera, with a 500mm lens, the only way to achieve 750mm is with a 2xTC</blockquote>

Verification