I purchased the Canon EOS adaptor so I can switch between the DSLR and the 1600. When using an off-axis guider it would be preferable to have both cameras parfocal as much as possible so that the guiding camera need not be refocused. I adjusted the adaptor so that the two camera are parfocal but unfortunately the camera sensors have different orientations. This causes a loss of image area when stacking.
Can the camera be rotated within the housing?