Archived posting to the Leica Users Group, 2008/05/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]"The outer, red box displays what a 24?36 mm sensor would see, the inner, blue box displays what a 15?23 mm sensor would see. The actual image circle of most lenses designed for 35 mm SLR format is somewhat larger than shown; the circle shown is the minimum to cover the corners of the film format." http://en.wikipedia.org/wiki/Crop_factor On 5/9/08, Steve Unsworth <lug@steveunsworth.co.uk> wrote: > > Yes, but if you rotated it by 90 degrees then it would only be 24mm wide. > Look at that red rectangle in the Wikipedia illustration and imagine 6mm > added to the top and bottom to give a 36x36 sensor. Some of the resulting > square would fall outside of the circle. > > > Steve > > > On 9/5/08 00:15, "Philip Leeson" <pjleeson@mchsi.com> wrote: > > > Er, umm, I'm pretty sure if you rotate that 24x36mm box in this > > illustration, it will still fit in that 36mm circle. > > > > <http://en.wikipedia.org/wiki/Image:Crop_Factor.JPG> > > > > The natural circular field of all lenses is made to fit square or > > rectangular only by the masking in the lens mount. > > > > Phil > > > > On May 8, 2008, at 3:14 PM, Steve Unsworth wrote: > > > >> No it won't. It's basic geometry. If the lens just covers 36x24 it > >> won't > >> cover 36x36. > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- Regards, Sonny http://www.sonc.com Natchitoches, Louisiana USA