But I will continue to maintain that the process you've described only
pertains to exposures equal to or longer than the sync speed. Continuing
to read the film surface can only be done while the shutter is fully
open. If the shutter is not fully open (speed faster than sync time)
the second curtain has already been released to form a slit with the
first curtain. The shutter speed has already been determined and
further reading the film surface makes no sense since the exposure is
already committed and can no longer be altered.
Chuck Norcutt
On 5/14/2014 4:33 PM, Ken Norton wrote:
As a result, the metering system ALWAYS begins to read the first
curtain and will continue to read the film surface until sufficient
exposure is attained. This is why the pattern changed in the first
generation OM-2. At higher shutter speeds, the OM-2 was much more
center-weighted than at longer shutter speeds.
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