Graflok Back Lock Standard - Does it exist?

[Dan Fromm]

I know what you mean by slides. I call 'em Graflok sliders.

You're right, what's important is the dimensions of the plates' edges. You call these flanges and with 4x5 that makes great sense; not so much with the not-to-be-mentioned here 2x3. If you look at how they go on the camera, you'll see that the plates have to be the same size -- length and width -- as standard sheet film holders. If larger they won't fit the camera, if smaller they risk not being light tight as well as falling off.

I just measured the edges of Graflex RH-8 (to fit 2x3 Graflok), 2x3 (to fit 4x5 Graflok) Linhof Super Rollex and 6x12 Sinar (to fit 4x5 Graflok) roll holders. 4.80 mm. 5.90 mm, and 5.65 mm respectively. If there is a standard Graflex made it. Ain't no standard.

Side comment. I think of Sinar roll holders as insertion types but they have slots that Graflok sliders will grab. They're more securely attached with the sliders engaged.

[europanorama]

Beside this i have an information from most probably tony sansone(yes he is around but busy):
Its about register: hope its the right term here.
comparing these 6x12 filmbacks:

Horseman
Linhof
Arca Swiss
Sinar
Horseman and Arca Swiss have different register than the others.

[Oren Grad]

Side comment. I think of Sinar roll holders as insertion types but they have slots that Graflok sliders will grab. They're more securely attached with the sliders engaged.

Most of them. The very latest ones - IIRC only the Zoom2 model - lost the slots.

[Oren Grad]

The slides I am referring to are the ones used to remove the ground glass panel and attach roll film holders onto the back of the 4x5 camera.

This is two different things. The design of the hook or other catch that retains the GG panel is not at all standardized. I don't think the thickness of the Graflok mounting plate for whatever the accessory is, is strictly standardized either, but in 20 years of fiddling with a variety of back/accessory combinations, I can't recall encountering a Graflok accessory with a mounting plate that was too thick for the sliders on any camera back I tried it with.

[IanG]

This is two different things. The design of the hook or other catch that retains the GG panel is not at all standardized. I don't think the thickness of the Graflok mounting plate for whatever the accessory is, is strictly standardized either, but in 20 years of fiddling with a variety of back/accessory combinations, I can't recall encountering a Graflok accessory with a mounting plate that was too thick for the sliders on any camera back I tried it with.

It's not even standard with Graflex cameras, the focus panel from a 5x4 Pacemaker Graphic Graflok back won't fit a Super Graphic. There's also two different Cambo types that aren't interchangeable.

Ian