RustyBug wrote:
So how does using FF lens on a smaller format \"ruin\" it?
I mean, if I\'ve got a Canon 135/2 and mount it on a 5D, 1D II and a Rebel ... how does using any of these different sensor size cameras get ruined by using full frame glass? The projected image from the lens will be the EXACT SAME, they will simply be capturing a different cropped portion of the projected image circle.
Well, you crop out half the image area and get something else than you\'d (I\'d) expect from the lens. You then have a larger magnification of aberrations and a narrower angle of view.
The main reason for using MF glass on FF is two-fold, less vignetting, smoother transitions.
I\'d really like to see those \"smoother transitions\". Really.
However, that projected image is the EXACT same projection whether you mount it to an MF, FF, APS-H, APS-C or 4/3 camera.
Yeah, which makes most FF lenses (unless reach is what you want) less good on APS-C.
If you mount MF glass on a camera with a MF sensor size of 44x33, does it give you the MF look at the 33mm edge?
Of course not, since you are getting a narrower angle of view. The \"MF look\" is to me about short DOF, z low amount of aberrations and high local contrast at a certain angle of view. Crop it, and the look is gone.
The \"MF look\" is not a property of the lens, but of the image format. How about trying to get this result from a smallish sensor. Good luck, since you\'d need a ~50/1.2 that is sharper wide open than any 50 mm lens is stopped down.
