Depth to Septem on YOUR 14X17" film holders

I am back to working on my 14X17 studio camera

This webpage is often quoted and described as wrong too!

http://home.earthlink.net/~eahoo/page8/filmhold.html

ULF film holders vary

What is this one dimension on yours?

14x17 holders should not vary. There is an ANSi standard for them and that is a familiar size in the medical community.Of course, "should" is the operative word...

Don't forget this discussion:

https://www.largeformatphotography.i...eems-odd/page3

Good luck!

Mike

Thank you Michael!

I am still interested in variations as there seems to be many over the last 150 years

According to my new depth micrometer, my medical 14X17 X-ray holders are T= 0.30" and that is significant to 0.01 not 0.001"

I have a few 11X14 film holders that vary 'deeply'!

Shortly I will test my 11X14 Levy Copy Camera which has adjustable camera GG with a calibrated lever. T for that is 0.75" and can change T range by how I use it's massive holders

Quote:

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Originally Posted by Michael Jones

14x17 holders should not vary. There is an ANSi standard for them and that is a familiar size in the medical community.Of course, "should" is the operative word...

Don't forget this discussion:

https://www.largeformatphotography.i...eems-odd/page3

Good luck!

Mike

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I keep reading this as " Death to September".
Not to be pedantic, but it is "Septum".
Carry on.

Only Mods can adjust titles

Thank you!

Quote:

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Originally Posted by Dugan

I keep reading this as " Death to September".
Not to be pedantic, but it is "Septum".
Carry on.

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Randy,

Different vintage and different format of holder, but my two 8x20 (using my digital vernier, if that is not a contradiction) is: 0.434" and 0.456" on the one, and 0.414" and 0.442" on the other measured at the edge.

The two wooden holders are for a 8x20 Korona and likely original, implying built in late 1920s to early 1930s.

Hope that is useful, and good luck with your research,

Len

Thanks Len!

I bought a large base Digital depth/height gauge that is easier to use than a normal vernier slide caliper

Soon I will measure 7X17 Korona. One OE film holder and 2 S&S exact copies

Here are Richard Ritter specs as measured by him, from his website, http://www.lg4mat.net/FilmHolderSpects.html Great data!

Sometime ago RR made me five 11X14 film holders that are excellent and fit his custom back made at the same time.

Randy,

Certainly the right tools make the job easier and does the job better (more accurate in this requirement).

As well as not having a height gauge, even if given one, would have no place to set the granite block to use it on...

The digital vernier is just a handy all around tool, but does have its limitations, especially in my hands... :cool:

Good tools can make a different, but outcomes are also dependent upon the skills of the individual wielding them.

Best wishes,

Len

I have two separate types of 14"x17" holders.

Measurements are only SO accurate, since the septums do flex. With that in mind, I took my measurements around the edges where the septums are let into the dados in the side rails.

Brubaker, made to fit an old ROC Carlton T= 0.315"

S&S, ANSI (more or less, they agreed with the Fidelity ones I once had) T= 0.339"

Both types are basically the same width, but the end flap is wider on the older style holders and the lock-rib location is different, nearly an inch lower (closer to the film gate) on the older style ones.

EDIT: Measurements and notes above.

Randy:

You may want to review Richard Ritter's page on dimensions as well.:

http://www.lg4mat.net/FilmHolderSpects.html

Good luck.

Mike