So third night out. Again leveled both mount and scope, latter with iPhone app level. Calibrated iPhone app level to real physical level. Got more aggressive with scope focal length (150 mm Mak Cass f/12) and use of 22 mm Nagler Type 4 eyepiece that provided a field of view diameter of about 1 degre...

Got substantially better results second night out. Leveled mount using Pegasus mount level, then refined that horizontal measurement (and home position) using fine adjustments with iPhone app level placed on telescope dew shield. The result was that - three aligned calibrations star were well within...

I am interested in this issue for alt-az operation. Just had first light with this mount and am using the mobile Unity Apple iOS app. Gotos were quite a bit off. Started with home position pointing horizontal and north (but not at Polaris). Will try with home position pointing at Polaris next time o...