Home-built Newt: 10" f/4.5 Royce conical primary, Skywatcher NEQ6 (Astrotroniks tuned) iEQ45, Duo-T, 8" f/4 Skywatcher Quattro CF 120 ED f/7.5 Skywatcher Black Diamond 80ED Stellarvue
Quote:OP, I did not mean to say you cannot successfully image with the iEQ45.What I said is that, the fast 5" periodic error, if present on all iEQ45's, will prevent you from getting the maximum performance out of your NP101is.But for practical reasons, since seeing in most areas is 2" to 3" - you will probably get good results whether or not the fast 5" term is present.Just not the best results you would expect from a premium imaging refractor. Like I said, it all depends on your preference and expectations.dvb - have you compared your NEQ6 and iEQ45 imaging with the same tube under similar conditions?One thing going for the NEQ6 / Atlas is that it has a very simple gearbox - just 2 gears. Simple gearbox means minimizing fast periodic error terms. I believe this is why most successful imagers in this mount price class are using the EQ6 / Atlas.
Quote:The azimuth adjustment is the same as with the Orion/ Skywatcher mounts. I am currently trying to source some bolts with rounded ends, although the dealer I bought mine through has offered to machine the edges off the bolt.
George You know you're getting on when the equipment you farmed with is showing up as suburban lawn ornaments.
Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
"Life is a journey, enjoy the ride" *********** Stellarvue 90 Raptor CF.Explore Scientific 152mm Comet Hunter.Orionx14g.Borg 125SD.Borg 60ED. Borg 50Achro. AT10RC. AT6RC. iOptron iEQ45GTN w/TDM.iOptron ZEQ25.iOptron Cube Pro.iOptron MT Pro/iOptron SmartEQ Pro.Celestron 10x50 Way too many EPs, flatteners and reducers. Nikon D5100, Canon T3i and a bunch of filters.