John aka: Byrdzeye NYAA, Toronto Observatorium Orionis XT10i w/PT (push-to) Orion 80ED on AZ3 or Advanced VX, Lots of Kendrick Dew Heaters, 500D and 700D w/24-105 L IS & 70-200 f4 L, 10-22mm f3.5 & 50mm f/1.8 ("I'll get you, my pretty!") Camper, GW, Taylor guitar & IPod
Quote: but don't most polar scopes rotate by themselves for proper alignment (this one doesn't seem to)?
Quote:Hi, Steve,Yes, I've also previously aligned the polar scope using those 3 screws, and rotating the RA to change the alignment etching, but don't most polar scopes rotate by themselves for proper alignment (this one doesn't seem to)? I'd like to get a reasonably accurate polar alignment so I can do some longer exposure piggy-back astrophotography (at least 2 minutes with a 200mm lens on my Canon XT). Any ideas and comments will be much appreciated.