Unfortunately I do not own a 4. But I have always wondered how
off-the-film measurement (and dynamic speeds) works together with
multi-spot measurement. Say, for example, you have defined two spots,
and then during a long exposure, the spots change light differently,
what happens ? Does the camera simply perform an overall level adjustment ?
Roland.
Moose wrote:
>Think about it a moment. You are designing the circuit. It is really
>easy to simply have it wait until sufficient light has been sensed and
>release the 2nd. curtain in TTL or simply hold the shutter open for the
>time calculated based on the light level sensed when the spot buton was
>pressed. In order to pick specific speeds, you actually need more
>circuitry and programming to correctly pick a specific shutter speed
>from a list. In other words, it takes more design complexity to make a
>system with a higher average exposure error. So of course nobody did that.
>
>The dots in the viewfinder resolve to 1/3 stop, but they are just an
>approximation of the actual stepless speeds in auto.
>
>Moose
>
>Mike Lees wrote:
>
>
>
>>What about in spot mode and the multi-spot average? Are shutter speeds still
>>continuous despite the exposure being determined prior to exposure? The dots
>>in the viewfinder would suggest a resolution higher than the standard shutter
>>speeds.
>>
>>
>>
>
>
>
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