The problem is that most of us don't know the FoV in degrees. We know it in 35 mm equivalent. It's the unit that everyone knows.
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. > -- Steve Desjardins -- 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.
