On Fri, May 25, 2012 at 02:30:57PM -0400, John Sessoms wrote: > From: Darren Addy > > >I'm curious... if it shows up in Photoshop as a Pentax-F 35-105mm, > >does that mean that it is also misreading the focal length that this > >lens is set at (when doing image stabilization)? > >If it is doing image stabilization for a 105mm focal length when the > >lens is set to 200mm, that could definitely lead to some lack of > >sharpness. I think I will see if I get better results with Image > >Stabilization off and tripod mount it (which I guess I should be doing > >to test for sharpness anyway!). > > I don't know. > > I think the camera just has to have some kind of a code to bury in > the EXIF to identify the lens & it uses the code that PhotoShop > thinks is the Pentax-F 35-105.
Don't blame the camera - it just reports the code it gets from the lens. Some manufacturers (most notably Sigma) didn't request a code from Pentax (presumably because there was a cost involved), so just used the same code for multiple lenses (usually one that corresponded to a Pentax lens that was similar to the first lens). I'm a little surprised to see that Tokina did this - they used to be a Pentax partner, so I'd expect them to get it right). As for the original query: it should be pretty easy to confirm that the reported focal length is correct - that information is also in the EXIF. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
