Hello, I have a problem with my architectural shots - I level the camera, use the glass grid along with front rise to get parallel sides, and use the glass grid to check for level against some roofline element. If I have a level camera but not a level roofline, windowline etc, then either the building is not level or I am not square against it's face and need to adjust swing. I usually check for swing-squareness by looking at focus on both sides wide open, and make the rotational adjustments on the tripod head, usually necessitating picking up the tripod and moving left/right to recenter. This method only gets me 50/50 perfect squareness. I have rotated the attached scan to align the left vertical correctly, you can see the error in the other dimensions. I am wondering what are the checks to do in the correct order to keep from making one adjustment throw off something you already checked.
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