Re: 220 frame counting

[Tom Deering <tmd@xxxxxxxxxxx>]

On 12/1/99, Paul Talbot wrote:

>Um, well, ..difficult to "resolve to the nth degree of
>precision," perhaps.  ;-)

You expressed your results in 0.25 turn increments, Paul, and I 
expressed mine in 0.1 turns.  That's not much difference in 
precision.

>So for all these reasons combined, I take a "loosey
>goosey" approach to the film wind-on issue.  It thus
>becomes not that big a deal, really, IMO.

Our results are similar.  Both show the  number of turns decreases at 
an uneven, difficult-to-guess rate.  So far, both are untested.

The only real difference between our methods is that mine is flat 
wrong.  :^)  :^)  I forgot that circumference is based on diameter, 
not radius.  Heh, heh.
 
Also, my assumptions about the length of the paper leader were wrong, 
according to the web site Brian gave.  I wish I had time to correct 
the spreadsheet, but I can't right now.

>Most likely,
>however, I did lose the first and last (12th? 13th?) to
>not having a full left and right frame on the film.

Two lost pair, which is the same as if you turned the knob a fixed 
three turns each time.  I'm sure I would forget how many I had shot, 
especially if a couple days passed.  At lease if you always turned 
three times, there's nothing to remember, and no chance of overlapped 
frames.

I probably should point out that I have never shot a roll of 220 in 
my life.  I don't even have a working camera right now.

Tom
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