Would Sharpcap give better PA than the Polemaster with the Polemaster camera? From my reading, the main benefit of Sharpcap was the possibility to use a larger aperture lens (such as guide scope or even main OTA) which would give you better resolution than the Polemaster does, hence better PA. The fundamental principle of both methods is very similar - in the Polemaster, you select the star and tell the software how its position has changed based on the mount's rotation. Sharpcap does something similar but plate solves. In theory, both methods should be similarly accurate, the difference being the optics used.