Godfrey - If my memory is working, m4/3 has an aspect ratio of 4:3, aps-c is 3:2. Is that correct? gs George Sinos -------------------- www.GeorgesPhotos.net www.GeorgeSinos.com
On Sun, Sep 8, 2013 at 12:17 PM, Godfrey DiGiorgi <[email protected]> wrote: > > On Sep 8, 2013, at 9:53 AM, Aahz Maruch <[email protected]> wrote: > >> The point is that m4/3 8mm is 16mm/e. > > It provides a 180° field of view across the format diagonal, same as the > corresponding full-frame fisheye for an APS-C camera. The reason for the > difference in effective focal length is the difference in format proportions. > >>> Your comment sounds like it fits one of the categories in Ctein's most >>> recent column on "The Online Photographer": >>> http://theonlinephotographer.typepad.com/the_online_photographer/2013/09/bad-science-vs-good-science-a-guide-for-the-layperson-part-1.html >>> >>> Check out the "God of the Gaps" category. ;-) >> >> <shrug> Some people regularly claim that they want FF over APS-C due to >> wide-angle versus crop-factor -- > > That's because most people saying that are using lenses and FoV notions > derivative of 35mm cameras. They had a Pentax film camera, they have a 16mm > lens, and they want the same field of view. That's the basis of the > "Full-Frame" insanity. > > FourThirds format lenses were designed from the ground up for FourThirds > format cameras. It is a complete system, with a different format proportion > and sizing basis. The lens system covers the entire range of useful focal > lengths and lens types from fisheye, ultra-wide rectilinear, up to 600mm > telephoto. You don't have to know anything about "35mm equivalent field of > view" or "crop factors" to use Micro-FourThirds and FourThirds equipment ... > They are irrelevant to the system, which is not derivative of anything from > 35mm film cameras. > > That's why I never mentioned "crop factor" to Marnie. It's simply not even > remotely relevant unless you want to adapt a 35mm camera lens to a FourThirds > format camera. > > G > > > -- > 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.
