Just remember - while all of this is mildly interesting, it doesn't really make a lot of difference to the end result. When you're looking at the photograph on a screen or paper, the tiny differences are extremely hard to see.
If the differences in f-stops are that distinct in a modern lens, you probably need to be looking for a different lens. And if you're looking at the sharpness, you probably don't have a very good photo to start with. gs George Sinos -------------------- gsi...@gmail.com www.georgesphotos.net plus.georgesinos.com On Tue, Jun 5, 2012 at 2:42 AM, Joseph McAllister <pentax...@mac.com> wrote: > > On Jun 4, 2012, at 17:31 , J.C. O'Connell wrote: > >> In theory a perfect lens would be sharpest wide open, so a really good lens >> would be sharpest close to wide open. If it takes 4 or 5 stops to sharpen up >> a lens, its probably not that great. As for good rules of thumb, I find f5.6 >> or f8 to usually work pretty damn good.... > > If a kens is designed to be at it's optimum wide open and becomes less sharp > as you stop down - > why bother with an aperture at all? DOF?? - use another lens. > > > > Joseph McAllister > Pentaxian > > > > > > -- > 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.
