HERE is a better video clip... This actually shows the calibration technique.
https://www.youtube.com/watch?v=k0HaRZi ... e=youtu.be
Your precision (read down to 1/2 mm) and there should be NO movement between the two poles when rotating the camera 30° left and right of the center mark.
We use PTgui Pro... but there is an less expensive Ptgui version (
https://www.ptgui.com/download.html ) ... as well as a free unlimited that when final stitched
watermark version.
THEN take a panorama and stitch it... for testing. When satisfied with results (no stitch errors) then MARK the screw and camera index points for upper bar fore and aft AND the bottom horizontal point using a permanent scratch mark or electrical tape SO you can remove and replace the camera on the pan head.
AFTER your satisfied with the results... then comes taking the panorama settings.
You will need to set the lens to maximize the DEPTH OF FIELD so that ALL is in FOCUS from 1 foot in lens front face to infinity
We use a Sigma 8mm and a full sensor Canon 5d.
Aperture priority at f/8
http://dofmaster.com/doftable.html
It is important that your camera focus ring be set the the HYPER Focal distance shown here as .90 as this too must be verified by opening your image editor software (we use Photoshop) and zoom in to 100% and look around your image to make sure ALL is sharp and clear. If it is not... then adjust your focus ring to .89 or .91 and re-shoot and stitch the equirectangle image and verify sharpness... repeat process 10 times until you get great results BEFORE you go out and take commercial imaging.

- Hyper Focal distance
- hyperfocal.jpg (258.77 KiB) Viewed 3652 times
ALSO see the focus lens ring setting with a different camera... but process is same.
viewtopic.php?f=6&t=3541&p=14052&hilit= ... cal#p14052
Hope this helps.