polaroid_memory
13-Jul-2023, 05:54
Hi all,
Technical question for you all today.
I only ever shoot my Graflex Speed Graphic (GSG) with an Aero Ektar (AE) lens in portrait orientation. I hate that to do this I have to affix it to my tripod head at 90 degrees. I operate my GSGAE like another other large format camera, I do not use the viewfinder/rangefinder focusing in any way, shape or form.
So, I have come up with a quick 3D model to place between the camera body and the Graflok back, that will attach to the wooden frame on one side, with holes on the other side corresponding with the back when rotated 90 degrees, permanently giving me portrait orientation.
Altering the focal plane poses no issue for me and the way I shoot. I have plenty of bellows to allow for this shift.
The opening at the back of the GSG is 149mm wide / 5.86in and 168mm high / 6.61in, so can in fact enable portrait orientation with the back rotated 90 degrees.
My question pertains to the shutter curtain and the way it moves across the film during exposure. Assuming we are looking at a sheet of film as loading in a GSS in normal landscape orientation, the shutter always moves across the 4 inch width of the film, regardless of the cameras orientation. However, by turning the back 90 degrees, the shutter will now pass over the 5 inch length of the film. (I hope I have explained that well enough).
So in doing this, by now changing the way the shutter will move across the film, will it change the effective shutter speeds of the camera when making an exposure? I assume the shutter of a GSG will move at the same pace from start to finish when the shutter is released, so I do not imagine it causing an issue, but wanted to ask for the expertise of those more experienced than me.
Any insight and/or advice on this matter would be appreciated. If you object to my “frankensteining” of my camera, please do not hijack this post with your grievances. If you must vent, send me a PM…
Technical question for you all today.
I only ever shoot my Graflex Speed Graphic (GSG) with an Aero Ektar (AE) lens in portrait orientation. I hate that to do this I have to affix it to my tripod head at 90 degrees. I operate my GSGAE like another other large format camera, I do not use the viewfinder/rangefinder focusing in any way, shape or form.
So, I have come up with a quick 3D model to place between the camera body and the Graflok back, that will attach to the wooden frame on one side, with holes on the other side corresponding with the back when rotated 90 degrees, permanently giving me portrait orientation.
Altering the focal plane poses no issue for me and the way I shoot. I have plenty of bellows to allow for this shift.
The opening at the back of the GSG is 149mm wide / 5.86in and 168mm high / 6.61in, so can in fact enable portrait orientation with the back rotated 90 degrees.
My question pertains to the shutter curtain and the way it moves across the film during exposure. Assuming we are looking at a sheet of film as loading in a GSS in normal landscape orientation, the shutter always moves across the 4 inch width of the film, regardless of the cameras orientation. However, by turning the back 90 degrees, the shutter will now pass over the 5 inch length of the film. (I hope I have explained that well enough).
So in doing this, by now changing the way the shutter will move across the film, will it change the effective shutter speeds of the camera when making an exposure? I assume the shutter of a GSG will move at the same pace from start to finish when the shutter is released, so I do not imagine it causing an issue, but wanted to ask for the expertise of those more experienced than me.
Any insight and/or advice on this matter would be appreciated. If you object to my “frankensteining” of my camera, please do not hijack this post with your grievances. If you must vent, send me a PM…