Archived posting to the Leica Users Group, 2015/07/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Think of a 50mm lens on a 6x6 camera and a 6x9 camera.... In landscape mode both will have the same angle of view vertically but different for horizontal and diagonal. When you get into different shapes then you have to pick one of the three dimensions to standardise on, in this example the 6x9 can cover everything the 6x6 can plus 50% more but change it to a 5x4 and things get more complex ;-) Size is just scaling, an equivalent for 10x8 is twice the focal length of 5x4. john -----Original Message----- Well now you have me scratching my head Jim! What is the difference between shape and size? In you're just prior email you listed that my 80 was the equivalent of a 50 for 35mm film/sensor size. That's what I consider normal ( really slightly telephoto, but as close as you get with modern lenses). Thus my statement. But still confused by shape vs size... Thanks for noodling this! Bob. Bob Adler Robert Adler Photography www.robertadlerphotography.com > On Jul 9, 2015, at 8:45 PM, Jim Nichols <jhnichols at lighttube.net> wrote: > > Bob, > > I think the light just came on. When you were responding to Nathan, were you using "4x5" as a shape parameter or a size parameter? I think both George and I were thinking size, but, since the 80mm IS the normal FL for your sensor, I think you were talking about the shape. Could this be the case? > > Jim Nichols > Tullahoma, TN USA > >> On 7/9/2015 5:57 PM, Robert Adler wrote: >> Hi Nathan, >> 80mm lens on 4x5 (pretty much considered the normal focal length: >> perhaps a little wide). Front tilt, so little change in perspective. >> Perhaps the elves built it? :-) >> >>> On Thu, Jul 9, 2015 at 2:30 PM, Nathan Wajsman <nwajsman at gmail.com> wrote: >>> >>> I find the perspective really strange. It looks like a toy bench has >>> been left next to the flowers. >>> >>> Cheers, >>> Nathan >>> >>> Nathan Wajsman >>> >>> >>>> On 09 Jul 2015, at 17:11, Robert Adler <rgacpa at gmail.com> wrote: >>>> >>>> Not really a bench view (too much poison oak behind it!) but a nice >>>> scene to stumble across: >>>> http://gallery.leica-users.org/v/rgacpa_HI/-2015-07-08.jpg.html >>>> Please look large (even though a large jpeg causes significant >>>> degradation... >>>> Best, >>>> Bob >>>> >>>> -- >>>> Bob Adler >>>> www.robertadlerphotography.com >>>>