Yes, all the exposure computation is seamless from 1/2000 to 2 minutes (or
whatever). The exposure is simply based on the accunulation of light by the
otf cell. When it adds up, the second curtain is released.
(FEI: Curtain speeds are around 1/90 to 1/100 of a second).
John
Kennedy wrote:
> In article , C.H.Ling <chling@xxxxxxxxxxxxxx> wrote
> >> >
> >> No, the meter does blend the reading from blind to film - that's how it
> >> manages to respond to strobe lights, other photographers flashes etc.
> >> When the OTF system was introduced by Olympus on the OM-2 that was
> >> actually used on a few of their adverts for it.
> >>
> >
> >I don't know how it is related to flash photograph. Except for Super FP
> >flash, OM4/Ti is lock at 1/60s with T-series flashes attached. Flash
> >will emitte only when the shutter is fully open, nothing in between, not
> >during shutter curtain is travelling. My last mail was talking about the
> >blending of shutter curtain and flim not the blending of day light and
> >flash light.
> >
> The point is that at all automatic shutter speeds the meter operates in
> an integrating mode - it adjusts to the total light reaching the film or
> shutter blind during the exposure. What may start as a 1/7th second
> exposure will change to a faster speed if the light changes after the
> first blind has been released - even if the first blind has not reached
> the other end of the focal plane. That could be from someone setting
> off a grenade, turning on a light in a room, your flash (which would set
> the shutter to 1/60s if it was a T series, but would not if it wasn't)
> or any other flash or strobe light (which would not have any means of
> telling the camera to default to 1/60th). There is NO hard and fast
> switch between the above and below 1/60s speed - it meters in auto the
> same way at all speeds.
>
> Other posts here have noted that the mismatch is small, even zero, at
> and above 1/60s, increasing to around a stop at 1/4s with one particular
> film type - this is exactly the effect you would expect if the film
> stock has a higher or lower than expected reflectivity. Your experience
> with a sudden transition at 1/60s is quite different.
> --
> Kennedy
> Yes, Socrates himself is particularly missed;
> A lovely little thinker, but a bugger when he's pissed.
> Python Philosophers (replace 'nospam' with 'kennedym' when replying)
>
> < This message was delivered via the Olympus Mailing List >
> < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|