Archived posting to the Leica Users Group, 2003/04/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Henning, > The shot with the 10D/50 will have significantly more DOF than the > one with the 80mm on 24x36. uhmmm.......i don't really agree - at least not from wat i observed when shooting. Calculations using DOF calculators also seem to fit my theory. i will go and do a test to find out since i have the necessary equipment. > Anyone who has shot different formats will attest to this. A 180mm > lens has the same angle of view on 4x5 as a 50 has on 24x36. Shoot > both of a subject at the same distance and aperture, say f/8, and > you'll instantly see that the 24x36mm shot has immensely greater > depth of field. No, we're comparing apples and oranges here. For one, your example uses DIFFERENT lenses optimised for their respective formats. There's no cropping factor here. the 180mm is made for use on the 4 x 5. Our original debate here is using lenses made for 35mm camera systems on different "formats" - the normal 24 x 36mm format and the smaller digital sensors of non full frame DSLRs. > Optical theory substantiates this. Yes it does, but u're comparing different things, as i said above. boon hwee - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html