7x11 film holder specs

[Michael Roberts]

Can anybody provide me with the critical dimensions of 7x11 film holders? I know not all brands are equal, so please identify the brand also.

Need to know:
1. Length--from the end of holder at the flap end to the beginning of the rib-lock
2. Width of holder
3. Thickness or width of rib-lock
4. Width of loading end flap

Thanks!

[Payral]

Canham holder specs:
http://www.canhamcameras.com/Film%20Holder%20Specs.html

[Michael Roberts]

Thanks, that's one!
Anybody with Eastman specs?

Wait, no....Keith doesn't list specs for 7x11....

So...that's none!
Anybody with Eastman specs?

[Richard K.]

How critical do you want these, Michael? I can measure my Chamonix with a ruker to give you an idea...huh...what...oh...or if you want a better idea, I can use a ruler!:D

[Michael Roberts]

A ruler is fine...as long as it is not a yardstick...

[Richard K.]

Can anybody provide me with the critical dimensions of 7x11 film holders? I know not all brands are equal, so please identify the brand also.

Need to know:
1. Length--from the end of holder at the flap end to the beginning of the rib-lock
2. Width of holder
3. Thickness or width of rib-lock
4. Width of loading end flap

Thanks!

OK as best as I can with my ruler, for the Chamonix 7x11 holder:

1.) 11 3/4"
2.) 8 9/32"
3.) 5/64"
4.) 25/32"

[Steve Goldstein]

From my Eastman Portrait Film Holder No. 1:

Length = 11 3/4"
Width = 8 11/16" (actually a shade less, but not 1/32" less)
Width of rib lock = 7/64" (height about 1/32"
Width of flap = 25/32"
Thickness = 9/16" (extra credit)

I'm not able to make an accurate T-dimension measurement (yet), though it looks very close to 1/4".

[Michael Roberts]

Thanks Richard & Steve!

[ctg]

Stupid question perhaps but why 7x11 format? Then on the other hand 'How'?

[Richard K.]

Well, it's the Golden Ratio, which many of us find pleasing. How? Adapter backs, old 7x11 cameras, new 7x11 cameras. Film is available yearly from Ilford....

See also:


http://www.largeformatphotography.info/forum/showthread.php?t=51286&highlight=7x11+camera

[Michael Roberts]

From my Eastman Portrait Film Holder No. 1:

Length = 11 3/4"
Width = 8 11/16" (actually a shade less, but not 1/32" less)
Width of rib lock = 7/64" (height about 1/32"
Width of flap = 25/32"
Thickness = 9/16" (extra credit)

I'm not able to make an accurate T-dimension measurement (yet), though it looks very close to 1/4".

Just got an Eastman holder from Jim Galli. I get the same L, W, and thickness. 1/8 for the rib lock. 27/32 for the flap.

Funny, I make the T-dimension to be 13/64 in. (0.203)). Most of the Canham and S&S holders seem to be 0.35 inches ...or close (except Canham's 4x10, which is 0.25in). So, as Steve said, very close to 1/4in (like the Canham 4x10 holder).



http://ssfilmholders.com/?page=critical_dimensions