With benign trepidation, Peter Loveday opined on 02/13/2001 16:35:
>> I think, from reading the specs, that the information would be taken from
the
>
>> Frame 0 data, where the film number is recorded. Any information other
than
>> that and the frame number last used is redundant.
>> An alternative is, that if the frame imprinting had been switched on, the
>> system simply advances to the first frame that does NOT have frame data
>> imprinted - then even the film number and frame number need not be recorded.
>
>Indeed, but given that data imprinting is purely optical (ie it exposes the
>edge of the film to the appropriate numbers from illuminated displays
>internally,
>just like date backs do it), then the question still remains.. how can it
>detect
>that this imprint has been done?
Can't, unless it physically marks the film.
I think the system probably counts sprocket holes, and would not work if
you do not place the end of the leader tongue exactly where you always
place it. If you tend to push the film in a notch or two, because you
don't trust that the mechanism will grab it properly with only a quarter
inch in the takeup chamber, you cannot predict where the frames will be
accurately. I'm sure there's a line you must toe somehow.
JoMac, Imagineer with Camera
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