This holder is basically a thingy that adds a lateral 1/4" thread base to a camera. Thus enabling to change the camera from horizontal to vertical orientation.
The same can be done with any ball-head or 3-way-head. Such holder though retains an exact 90° re-orientation.
And in contrast to the above heads it also retains the location of the optical axis. If apt for the camera.
The Holder F3 fits a Canon AE-1 though retains a height difference for the optical axis.
With Power Winder A mounted the height difference seems reduced to a few milimeters.
But the two 1/4" threads are positioned at different longitudinal distances from the film plane, thus re-orientation necessitates re-focusing in critical cases.
I am puzzled by this design.
The same can be done with any ball-head or 3-way-head. Such holder though retains an exact 90° re-orientation.
And in contrast to the above heads it also retains the location of the optical axis. If apt for the camera.
The Holder F3 fits a Canon AE-1 though retains a height difference for the optical axis.
With Power Winder A mounted the height difference seems reduced to a few milimeters.
But the two 1/4" threads are positioned at different longitudinal distances from the film plane, thus re-orientation necessitates re-focusing in critical cases.
I am puzzled by this design.