On Fri, Apr 21, 2006 at 07:40:03AM +0100, Thibouille wrote: > I'm really lost now. Could someone tell me how to convert between > those formats and 35mm? > > 35mm -> *istDx is 1.5x > 35mm -> 645 ?? > 645 -> 645D ?? (I think it is 1.3x but not sure). > 35mm -> 645D ?? > 35mm -> 67 ?? > > Thanks
It's complicated somewhat by the fact that the aspect ratio isn't the same (35mm & *istD are 3:2, 645 is 4:3, 6x7 is 7:6) But, roughly speaking: 35mm -> *ist-D 1.5x 645 -> 35mm 1.75x 67 -> 35mm 2x So, if 645->645D is 1.3x, 645D -> 35mm would be 1.75/1.3, or 1.33
