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)
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