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- Path: sparky!uunet!cs.utexas.edu!torn!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: <1992Dec28.213545.18654@jarvis.csri.toronto.edu>
- References: <TJWU.92Dec28153541@carbonara.mit.edu>
- Date: 29 Dec 92 02:35:46 GMT
- Lines: 28
-
- In <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?
-
- With the release of the EOS 10s, the following USM lenses were reported to
- return focus distance information:
-
- EF 35-135mm f/4.0-5.6
- EF 70-210mm f/3.5-4.5
- EF 100-300mm f/4.5-5.6
- EF 100mm f/2.8
-
- The EOS 10s came out in 1990. I imagine all USM lenses since then
- include focus distance decoders. However, Canon doesn't claim to use
- the information for anything.
-
- See my tirade on the "Re: Canon 10s Vs Nikon N90, Which one?" thread to
- see why focusing distance is not terribly useful for judging exposure.
- (Though it would be neat to be able to see it in the viewfinder!)
-
- ACS
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