Thanks for the replies. I had not been able to find anywhere that the magnification factor was 0.8. That would have made a lot of sense had I known :-)
As to the "rant", I hear it all the time. I an 69, feel older most of the time, and don't have the desire to change my thinking process. It works for me as is, so that's the way it will be! :-) Rant off!! Walt On Sun, Jun 12, 2011 at 5:33 PM, David Parsons <parsons.da...@gmail.com> wrote: > I'd say that the focal length is 14mm with a .8x WA converter. Or > equivalent to 11.2mm. > > Are we going to keep referencing Effective Focal Lengths of 135 film > forever? We all know that focal length doesn't change with film > format size, so why keep using a marketing term? If you really feel > the need to compare, use angle of view which is directly comparable. > /rant > > On Sun, Jun 12, 2011 at 5:24 PM, John Francis <jo...@panix.com> wrote: >> On Sun, Jun 12, 2011 at 03:46:38PM -0400, Walter Hamler wrote: >>> http://walthamler.smugmug.com/Photography/Micro-Four-Thirds-Gallery/16211247_u3uwa#1333816493_QWjXf7X >>> >>> The last two images were taken in our local camera store. One is >>> captioned that it was shot with the EPL2 and the standard lens set at >>> 14mm (28 equiv). >>> The next image is with the OLY WA lens adapter, but they do not say >>> what the effective fl is. Anyone care to venture a guess? >>> It doesn't quite look like it is 24mm equivalent, perhaps 25. >>> Both images taken from same distance. >>> >>> Walt >> >> Well, the angle of view of the original image covers about 80% of the >> wider-angle image. That would mean it's 0.8x28mm = 22.4mm equivalent. >> Given the precision of the actual experiment (you might have moved >> your feet, or leaned forwards a little more for one shot), all you >> can tell from those images is that the effective focal length will >> be somewhere in the 21mm - 25mm range, >> >> Postscript: Olympus claim the converter is a 0.8x, which matches my >> estimate of about a 400-pixel margin on either side of your 4K image. >> So the effective focal length at full wide will indeed be 22.5mm. >> >> -- >> 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. >> > > > > -- > David Parsons Photography > http://www.davidparsonsphoto.com > > Aloha Photographer Photoblog > http://alohaphotog.blogspot.com/ > > -- > 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. > -- 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.
