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About expensive lenses
"M-M" wrote in message ... A Nikon 85mm 1.8 is $400.; an 85mm 1.4 is $1100. Is the extra stop really worth all that extra expense? No. The 85mm f1.8 AF is a superb lens, sharp to the corners even wide open, at all focus distances. Why not just up the ISO to compensate for those shots that really need the speed? Am I missing something? No. A little bump in sensitivity (just when would this *really* be needed...?) should be fine, *if necessary* - but the difference can also usually be made up with a slightly lower shutter speed (with repeated frames to assure a sharp one). -- David Ruether http://www.ferrario.com/ruether |
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About expensive lenses
David Ruether wrote:
"M-M" wrote in message ... Why not just up the ISO to compensate for those shots that really need the speed? Am I missing something? No. A little bump in sensitivity (just when would this *really* be needed...?) should be fine, *if necessary* - but the difference can also usually be made up with a slightly lower shutter speed (with repeated frames to assure a sharp one). Sure, if you're in a brightly-lit studio or something it's easy, no need for fast lenses. I'm often shooting at my maximum aperture, maximum ISO (or max usable; I haven't tamed the 1600 settings on my D200 yet), and a shutter speed so low that I lose about 2/3 of the photos to subject motion (not camera motion, subject motion). Slowing down the shutter another stop would probably raise the reject rate to 99%, so that's not really a choice. Buying a whole new system where I could shoot at ISO 3200 has its atractions, though I haven't seriously considered it yet. So I like fast lenses a lot. Though I did settle for a used 85mm f/1.8 rather than paying for the f/1.4; I know I can get by okay at f/1.8, and and I got mine for $250 (an AF, not the newer AF-D); the jump to an f/1.4 was not really something I could afford at the time. I've got the 58mm f/1.2 NOCT for the *real* emergencies. |
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