On Thu, Jun 09, 2011 at 04:02:44PM +1000, Anthony Farr wrote: > > > > I know it won't work with digital because of the sensor dimension ... > > bummer. > > > > Are you sure of that? Doesn't it just split the frame down the middle > into a left and right image? Does the format size or the field of > view make any difference?
Yes, it makes a difference, but not one impossible to overcome. The adapter is designed to produce left and right images covering the same field of view on one frame of film. Just using that on a smaller sensor will lose the left third of the field of view from one half, and the right third of the field of view from the other. This means the only part of the field of view in both parts is the central third. The way to compensate for that is simple; use a lens which covers the same field of view on the smaller sensor as the lens for which the adapter was designed when it is used on a full-frame sensor. I believe the adapter was designed for use with a 50mm or 55mm lens. That means you should use something like a 35mm lens on APS-C, I'd expect anything in the 31mm - 40mm range would work just fine. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
