Archived posting to the Leica Users Group, 2004/02/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]What happens is that that when you mount your 50 mm lens on a camera with a 1.5 multiplication factor, the 50 gives you the magnification and field of view of a 75mm lens - BUT - it still has the depth of field of a 50 mm lens because you are still using the central portion of the 50 mm lens...or something like that. ;-) - -----Original Message----- From: owner-leica-users@mejac.palo-alto.ca.us [mailto:owner-leica-users@mejac.palo-alto.ca.us] On Behalf Of Tim Atherton Sent: Monday, February 16, 2004 3:37 PM To: leica-users@mejac.palo-alto.ca.us Subject: RE: [Leica] Digital Bessa RF > > Does the depth of field really increase? > > > > Normally if you change focal length, an object framed to the same > > size (using the same f stop) has the same depth of field? (or that's > how I always > > understood it...) > > But evidently it's connected to the size of the take-up media (sensor, > film etc). Though the same lens on a different format also doesn't change the depth of field does it? My 250mm Fuji lens has the same depth of field on my 8x10 as when I put it on a 4x5 - but then I usually get lost in the math somewhere around here and have to rely on Henning to explain it... :-) > All I know that it is hard enough focusing with a 35mm in an SLR > (manually). It gets harder every year. :) Yep! - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html