Archived posting to the Leica Users Group, 2009/12/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I guess it is treading a thin line, but I usually think of a "crop factor" when using legacy lenses on a small sensor system. For instance, when using my 21/3.4 SA (with its image circle designed for 35mm) on a m4/3 system, I think "crop factor of 2." When using a lens designed for the 4/3 or m4/3 system and the 4/3 image circle, I don't think of it as "cropped." I may be alone on this one... Matt > Maybe that's just a terminology thing then? I'm talking "crop factor" from > the sensor dimensions and I think you are asking about cropping from the > captured image? > I'm trying to describe the difference when you want a 'normal' viewpoint > but > you get the apparent distortion and the greater depth of field but not the > traditional field of view of a 20mm lens in this case. > Don't get me wrong I think that micro four thirds in particular is a very > smart development for the market and is now starting to provide some real > benefits in design and form factor etc. Having said that I think the E620 > for example makes the best for thirds sense for a dSLR user (the > viewfinder > is primary for me) > I'm just interested to hear if others share those same reservations that I > mentioned. I won't flood the list with more responses right now but I am > hoping that others might want to contribute to the discussion. Not often I > contribute on anything non-Leica here ;-) > > 2009/12/2 philippe.amard <philippe.amard at sfr.fr> > >> so it is not cropping is it? >> ph >> Le 1 d??c. 09 ?? 21:57, Geoff Hopkinson a ??crit : >> >> >> I mean having to use a 20mm lens in this case to produce the effective >>> field of view of a 40mm lens on a "35mm" camera. >>> >>> 2009/12/2 philippe.amard <philippe.amard at sfr.fr> >>> >>> >>>> Le 1 d??c. 09 ?? 21:44, Geoff Hopkinson a ??crit : >>>> >>>> >>>> I mean cropping the centre out of a 20mm shot on a 24x36 camera frame >>>> in >>>> >>>>> this case. >>>>> >>>>> >>>> Geoff what do you mean there? >>>> Amiti??s >>>> Philippe >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Leica Users Group. >>>> See http://leica-users.org/mailman/listinfo/lug for more information >>>> >>>> >>> >>> >>> -- >>> Cheers >>> Geoff >>> http://www.pbase.com/hoppyman >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >> >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > > > -- > Cheers > Geoff > http://www.pbase.com/hoppyman > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information