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- Path: sparky!uunet!utcsri!csri.toronto.edu!acs
- Newsgroups: rec.photo
- From: acs@csri.toronto.edu (Alvin Chia-Hua Shih)
- Subject: Re: Which lenses report focusing distance electronically?
- Message-ID: <1992Dec30.190339.2907@jarvis.csri.toronto.edu>
- References: <TJWU.92Dec28153541@carbonara.mit.edu> <6129@rosie.NeXT.COM>
- Date: 31 Dec 92 00:03:40 GMT
- Lines: 31
-
- In <6129@rosie.NeXT.COM> jspirer@rain.next.com (Jeff Spirer) writes:
-
- >In article <TJWU.92Dec28153541@carbonara.mit.edu> tjwu@athena.mit.edu
- >(Thomas J Wu) writes:
- >> Are Nikon's D-series lenses the only AF lenses that report focus
- >distance
- >> to the camera body? Do any Canon, Minolta, or third-party lenses do
- >this?
-
- >Don't most autofocus point-and-shoots do this? My understanding is that
- >they use the "flashmatic" system that controls light output by distance
- >from the camera of the subject. This would require some sort of
- >information from the autofocus system.
-
- Perhaps. But most P&S cameras have a fixed flash, so the guide-number
- calculations can be applied to provide a reasonable guess for what
- flash output/aperture combination to use.
-
- I imagine most P&S cameras are designed with the assumption that print
- film is the film of choice. Modern print films, having the wide
- latitude that they do, could allow P&S cameras could get away with not
- having OTF metering.
-
- ACS
- --
- ___ ___ ___ ______________________________________________________________
- | | | __|"The Nikon lens owners are more gratingly smug, while the |
- | - | --|__ | Canon lens owners are more verbally abusive." - Tony Arnerich|
- |_|_|___|___|______________________________________________________________|
- Alvin_C._Shih____________________acs@csri.utoronto.ca______________________|
-
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