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thejager Joined: 17 Feb 2004 Posts: 3 |  Posted: Tue Feb 17, 2004 9:51 pm
can I put a 6x9 "23" graphic on my RB67?
please email me back
aksteele@indiana.edu |
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glennfromwy Joined: 29 Nov 2001 Posts: 903 |  Posted: Wed Feb 18, 2004 12:54 am
Absolutely!
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thejager Joined: 17 Feb 2004 Posts: 3 |  Posted: Wed Feb 18, 2004 1:29 pm
will i get a "6x9" image??? |
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Dan Fromm Joined: 14 May 2001 Posts: 2165 |  Posted: Wed Feb 18, 2004 2:49 pm
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On 2004-02-18 05:29, thejager wrote:
will i get a "6x9" image???
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no |
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thejager Joined: 17 Feb 2004 Posts: 3 |  Posted: Wed Feb 18, 2004 2:52 pm
why not |
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Les Joined: 09 May 2001 Posts: 2682 |  Posted: Wed Feb 18, 2004 3:13 pm
Because.
Because there were never standardized image sizes for 120 film. The original "graphic 23" would come the closest, but it doesn't have the pin rollers that help keep t he film flat, curve film is great when you want to frustrate your lab guy, but not good what you want a sharp image from edge to edge. When they put the pin rollers in, they cropped the image closer to 6x8
Now I haven't tried this, but it's possible that the body of the RB will vignette a 6x9 image. Afterall it was designed for 6x7, so the body aperture wouldn't need to be much more than 7x7 or 8x8.
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glennfromwy Joined: 29 Nov 2001 Posts: 903 |  Posted: Wed Feb 18, 2004 4:48 pm
To begin with, "6X9" is not truly 6X9 and never has been. It's just a useful figure that's easier than, say, 56mm X 85mm or some such nonsense.
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Dan Fromm Joined: 14 May 2001 Posts: 2165 |  Posted: Wed Feb 18, 2004 6:47 pm
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On 2004-02-18 08:48, glennfromwy wrote:
To begin with, "6X9" is not truly 6X9 and never has been. It's just a useful figure that's easier than, say, 56mm X 85mm or some such nonsense.
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Um, once upon a time we used imperial units. Image sizes were specified in inches and, sometimes, fractional plates.
The plate is 6.5" x 8.5", hence quarter-plate is 3.25" x 4.25". That size should be a little familiar to users of Speed Graphics.
Standard formats shot with 120 film included 2.25" x 2.25", 2.25" x 2.75", and 2.25" x 3.25". When the metric system came to photography, these sizes, which are sometimes, not always, close to real roll holders' and roll film cameras' gate sizes, were replaced with metric approximations. 6 cm x 6 cm, 6x7, and 6x9 respectively.
And then people who didn't know history or reality starting acting as though the metric approximations were the actual gate sizes. They weren't, they aren't, and they probably won't ever be.
Cheers,
Dan |
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glennfromwy Joined: 29 Nov 2001 Posts: 903 |  Posted: Thu Feb 19, 2004 2:46 am
Right you are, Dan. However, we haven't touched on the fact that every camera manufacturer seemed to have a little different opinion of what these sizes were, so there was always a tiny bit of "individuality" thrown in for good measure. Or, perhaps it was "artistic license".
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