If some dont cover full frame than its pretty obvious to me that DA lens series is not intended nor guanateed for full frame usage, they are for APS usage. Just like some K series full frame lenses could work on larger formats than but were not sold nor intended for use on larger formats than 35mm. I would think that the DA lens series is NOT for full frame usage according to pentax.
JC O'Connell (mailto:[email protected]) "Honesty is the first chapter in the book of wisdom" - Thomas Jefferson -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mark Roberts Sent: Wednesday, April 29, 2009 12:56 PM To: Pentax-Discuss Mail List Subject: Re: image circle of DA lenses: how much smaller than FF? Luiz Felipe wrote: > I was looking for data on the available 180~200mm 2.8 lenses for K and > EF mounts, and found some story about how the DA* 200 2.8 is related to > the former 200mm full frame and so it possibly would cover said full frame. > > That got me wondering if one of the tech-oriented actually knows the > image circle dimensions for the DA lenses, and how much is missing. I > know the difference should be proportional to the difference from APS-C > to 24x36mm, but would like ko know the size and borderline falloff > evolution on the DA lenses. > > Just wondering, TIA. :-) It varies. Some DA lenses cover full frame, some don't (it's the wide angle ones that don't, in general). As far as anyone can tell, the "DA" designation indicates that the lens is optically optimized for digital and that it doesn't have an aperture ring. It doesn't seem to specifically relate to the image circle. -- 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. -- 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.
