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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!usc!sdd.hp.com!nobody
- From: johno@sdd.hp.com (John Ongtooguk)
- Newsgroups: rec.photo
- Subject: Re: Re: 105mm f/2.8 AF Micro Nikkor lens & F3HP : SUMMARY
- Date: 22 Dec 1992 21:37:22 GMT
- Organization: Hewlett-Packard, San Diego Division
- Lines: 24
- Distribution: world
- Message-ID: <1h81qiINNc3p@hpsdlss3.sdd.hp.com>
- References: <lakhindr.724711956@bowmore.NSD.3Com.COM> <121000005@hpldsla.sid.hp.com> <1992Dec22.183017.5966@cello.hpl.hp.com>
- NNTP-Posting-Host: hpsdlg10.sdd.hp.com
-
- In article <1992Dec22.183017.5966@cello.hpl.hp.com>, jacobson@cello.hpl.hp.com (David Jacobson) writes:
- |> In article <121000005@hpldsla.sid.hp.com> tonya@hpldsla.sid.hp.com (Tony Arnerich) writes:
- |> >
- |> >The only thing that the lens tells the F3 is how far down from wide
- |> >open the aperture will be during the exposure. You'd have to use the
- |> >math to find the effective aperture.
- |>
- |> At least with the 60mm MicroNikkor, the focal length changes as it
- |> focuses, and this change is not specified, so you can't use math to
- |> figure the effective aperture.
- |> .....
- |> And, as others point out, this whole compensating thing is only a
- |> problem if you are using external metering, sunny-16, etc.
-
- non-TTL flash too. One can also calibrate the lens easily in a few
- minutes and mark the light loss on some pin stripe tape placed
- around the lens barrel. I did this to all of my lenses awhile
- back, where I mounted the camera on a tripod, aimed at the clear
- blue sky with the lens set at infinity, nulled the meter on my FM2,
- changed the film speed 1/3 stop, focused to null the meter, marked
- the tape, changed the film speed, etc. As I recall the 55 f2.8
- lost either 1 1/3 stops or 1 2/3 stops.
-
- John Ongtooguk (johno@sdd.hp.com)
-