On Sep 19, 2011, at 10:20 PM, Paul Stenquist wrote: > > On Sep 19, 2011, at 9:46 PM, Larry Colen wrote: > >> On 9/19/2011 6:14 PM, Paul Stenquist wrote: >>> I find the essayist's snoopy metaphor silly and demeaning. And while he >>> admits to an Adams renaissance, t's clear that he doesn't understand the >>> artistry of Adams' work and how he was able to bend light in the darkroom >>> to idealize a scene. He seems dismissive of the zone system, a a way of >>> working that redefined photographic excellence. The writer continues to >>> demonstrate his lack of photographic knowledge in asserting that an f64 >>> aperture results in both optimum depth of field and clarity. Depth of >>> field, yes. Clarity, no. >> Doesn't that depend on the focal length? Whether you're using a 6mm lens on >> a point and shoot, 30mm on an APS, 50mm on a 35mm, or 300mm on an 8x10? > > Yes it does. But even on a "normal" 300 mm lens for 8x10, f64 is a small ap > and will cause diffusion. It's definitely not optimum in that regard.
Further research reveals that diffusion varies with format size, not focal length. f64 on 8x10 is said to be approximately equivalent to f8 on 35 mm film, so it's safe to day that diffusion isn't a problem at that aperture, yet it's not necessarily correct to say that f64 produces optimum clarity. But this is a small point. Overall, I felt that the essayist didn't demonstrate a firm grasp of photographic principles. Paul >> >> -- >> Larry Colen [email protected] (from dos4est) >> >> >> -- >> 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. -- 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.
