Gene,
I checked septum widths on three different bag mags. There is a tiny bit
of variation, but I still come up with a figure just over 100mm width
(100.4mm was one measurement).
I don't know if Graflex ever changed the septum width in all the years
they made bag mags. My 1904 Graflex catalog shows a version for cut film
using a metal septum to hold the film. Maybe the septums for the early
versions were slightly wider.
There was also a bag mag made to take glass plates. Is the channel in your
septums wide enough for a plate?
Here is one possible source of septums:
http://www.pacificrimcamera.com/catalog/fp11.htm
Let us know about the camera you are building.
Leonard
At 07:30 AM 11/9/2001 -0800, you wrote:
>Leonard and List,
>
>Excellent! We're getting somewhere! My septums are 103.5mm or so
>wide. Your 100.5mm septums would fit this mag like a glove. Now I just
>have to find some correct septums, and maybe find out what these septums
>were intended for so someone can put them to use. Incidently, this is
>for a camera I'm building to use some aerial lenses I have. An actual
>Cameramaker activity!
>
>Gene
>
>Gene
>
>Leonard Robertson wrote:
>>
>> Gene,
>> I measured the width of a septum from one 4X5 bag mag I had
handy and it
>> is 100mm or slighly more (maybe 100.5 mm). That is a rough measurement with
>> a metric tape measure. Tomorrow I will dig out more bag mags and Starrett
>> calipers, and try to see if there is any variation in the mags I have.
>> In 5X7 bag mags, I keep running across a version at camera swaps
that I
>> believe was made for aerial cameras (as I recall, some are marked
>> "Fairchild"). They are very, very heavy compared to the one "civilian" mag
>> I have. I have no idea if an aerial 4X5 bag mag was made. If so, it may
>> have used a different width septum.
>>
>>
Leonard
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