On Sun, 27 Aug 2006, Godfrey DiGiorgi wrote:
> On Aug 27, 2006, at 1:30 PM, Ryan Brooks wrote: > >> It appears to be a crop of a wide angle lens, which it is. >> >> In particular, informal head and shoulders shots look a bit odd if I'm >> close to the subject. The shoulder may seem enlarged if I'm taking a >> profile, for example. Whereas a 50mm would compress this distance >> more. >> >> I thought I would be at home with the 31mm limited on the D, but >> using a >> wide angle lens to achieve a normal-length crop is a bit wonky to >> me. I >> still like it, I wish I was using a 50mm focal length instead of a >> 31mm >> lens cropped. > > ??? > > I don't know how you can tell the difference. The lenses' rendering > qualities might be slightly different with respect to out of focus > elements and rectilinear correction, but with regard to field of view > and perspective: if the field of view is the same, the perspective > will look the same. The field of view is the same, but that doesn't say anything about the transform taking place optically. The image from 50mm crop of a ~31mm lens != 50mm full frame. Try it. You can really see it when you're framing, and it makes for weird magnification of things close to the lens. I'm not talking about bokeh or anything esoteric. Try it. Cropped focal length isn't the same as focal length. Not interested in a debate, -R -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
