On Mon, Sep 24, 2012 at 3:16 PM, Mark Roberts <[email protected]> wrote: > Bruce Walker <[email protected]> wrote: > >>Pentax literature points out how the final element of DA glass is >>configured to direct the photons at right angles to the sensor to >>compensate for the fact that the sensor is most sensitive to >>perpendicular light. Film did not have this issue, hence FA glass (and >>before) doesn't do this so the image will be fuzzier, especially off >>center. >> >>My understanding is that all DA glass has been created with this >>astigmatism compensation specifically with sensors in mind. > > Erm, this is nothing to do with astigmatism.
Okay. It might have more to do with the marketing hype as someone mentioned, as I scraped that off of the current Pentax.jp site wrt one of the DA lenses. :-) -- -bmw -- 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.
