Actual size from my Fuji GW690III is 56.5mm X 86.5mm.
Actual size from Mamiya 7II is 56mm X 70mm.
Sandy King
I use Voigtlander VC II hot shoe light meters on my 6x6, 6x7 and 6x9 RF cameras.
Love them!
Meter angle approximately 30 degrees
Silicon Metering Cell
LED meter read out, center round green LED, red LEDs on both sides
ISO 25 to 3200 with 1/3 stop increments on the film speed dial
The ISO film speeds are marked at 1/3 stops.
Powered by two LR 44 alkaline or SR44 silver oxide batteries
Taking aspect ratio and the measured narrow dimension of the negatives into account, that doesn't ring as true as it might appear at first glance. The aspect ratio of a full theoretical 6x8 is 0.75:1, whereas the full frame of the Fuji 690 negative is much closer to 0.67:1, much closer to the 6x9 or 35mm full frame ratio. This is why my C/V 40mm hot shoe finder for 35mm works so well with the GW690II.That's what I thought, that it must be the same dimension for both the 65 and 90mm lens. Voilà - the true 6x8 format found..!
In fact I confused the Sandy's camera type - he speaks about the GW690III camera - the same as I have. It's not possible that it would have the actual film size diffferent from mine. Can you recheck it again?
And, as you, David, already have negatives from the GSW690III - can you measure the actual film size of them? It should be the same - 56x82mm.
Sandy,I owned a GSW690III for several years. The film gate on it was 57mm X 85mm.
I checked again the measurement of the GW690III, and it is definitely 56.5mm X 86.5mm.
The difference in actual size certainly seems odd.
Sandy King
Sandy,
Are you the original owner on both cameras? Do you have a half-circle notch a couple of mm down from the top on the left side of the film gate when viewed from the back of the camera?
Lee
Sandy,Lee, I am not the original owner of the GW690III. However, the gate does indeed have a half-circle notch, though it is a a couple of mm *up* from the left side of the gate when viewed from the back. The camera does not appear to have been modified by the previous owner.
I was the original owner of the GSW690III which had a film gate size of 57mm X 85mm.
Sandy King
Taking aspect ratio and the measured narrow dimension of the negatives into account, that doesn't ring as true as it might appear at first glance. The aspect ratio of a full theoretical 6x8 is 0.75:1, whereas the full frame of the Fuji 690 negative is much closer to 0.67:1, much closer to the 6x9 or 35mm full frame ratio. This is why my C/V 40mm hot shoe finder for 35mm works so well with the GW690II.
Lee
That was my point, that the edge support made a full 60mm width mechanically impractical, so to keep the 6x9 aspect ratio the reduced long dimension is required. You could get a 0.75:1 ratio by doing 56mm x 75mm at the film gate. 120 formats are more like finished lumber dimensions in the US, nominal.Lee, you can never have a true theoretical 0.75:1 ratio on the frame because the film itself is just 61mm large. All 120 film cameras must have one or more mm metal edge on the film (on each side) to support it. Therefore the Fuji690 is still the closest you can get to a true 6x8 (actual!) film format. The theoretical aspect ratio in this case is misleading as you compare apples and oranges - i.e. theoretical and actual (possible) film formats.
Aaargh, I have been chasing a top condition gsw690III for years. I thought I finally had it a few years ago and it turned out to be an elaborate ebay hoax
....
The fact that we have Fuji GW690III cameras with two different dimensions of the film negative is remarkable by itself - the 3.5mm difference just doesn't make a sense photographically but may have some mechanical reason in connection with film winding mechanism or maybe they tried to make the film lying flatter on the later (mine with 56x82mm format) GW690III model. Interesting.
Mine's a GW690II, bought in late '88 (?) from B&H, #2120xxx. 82mm image width.I would be curious to know if the film gate size is related to period of production, in that it was 56X82mm at one time, and later changed to 56X86mm, or vice versa.
Sandy King
My GW690III is the last one on the shelf (just kidding...) - its production number is 7110xxx. Still looking like new, after being with me all over the world (in its soft pouch in a backpack and a specially made case in a car).
Sandy, did you measure the 86 (86.5)mm on the film gate in the camera or on an actual film negative?
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