Hi Monty,
Yes indeed I have heard this rule of thumb also and I tend to work by it, I never shoot anything beyond f11. For close ups of jewellery I am forced at times to capture multiple captures of different focus and comp together in PS, a real pain though, but the end result is worth it. I believe that supremo of jewellery photography, Paul Hartley, employs this technique from time to time
One other thing would definitely make things much sharper for you would be to upgrade your 132C to the 4 shot version, you'll see a world of difference believe me, miles sharper. Beware some would say too sharp as the 4 shot captures reveal every last blemish on jewellery = more retouching !!
Vicious circle innit ?!
All the best,
Barry
On Friday, August 6, 2004, at 02:30 AM, Jeff Smith wrote:
A few years ago there were a couple of white papers floating around concerning optimum apertures for digital photography. While I can't cite technical or statistical facts concerning diffusion etc., the gist of the information came down to the rule of thumb that the best corrected optics will be sharpest at an aperture that is closest to the well size in microns. That means that if you're shooting with a philips chip with 12 micron well sites, f11 is probably going to be the optimum aperture for sharpness, with the 11mb chip, the 9 micron well site means optimum aperture will be f8 or so. Stopping down actually decreased apparent sharpness of the unsharpened files. Chips do not record light falling on them the same way film does (did?).
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