Adam AP Mach 1, Rob Miller TRI36L, Celestron 8" Edge HD Hyperion 17mm, Celestron 40mm Plossl, TMB 7mm & 9mm WO 66, Lunt LS60/B1200 PT, CG-5 Clone STF-8300m Pro Package, Honis-Modified Canon XS, Un-modded T1i, SSAG, TSOAG9, SX Lodestar
Lackawanna Astronomical Society
Others may disagree. Your millage may vary. Void where prohibited by law.
Quote:Because sidereal rate isn't.Due to atmospheric refraction at different elevations (altitude) the speed is not precisely the sidereal rate.Also with an SCT, the mirror moves around as you point to different objects, causing image shift.But in answer to your question... yes a good worm-drive mount and a guider is what I'd do. In fact that is what I have done.
Quote:i read that people get 40 minute exposures at over 2000mm focal length so i don't think that it is usable only with short focal lengths.
Quote:Well about the ASA MLPT - i read that people get 40 minute exposures at over 2000mm focal length so i don't think that it is usable only with short focal lengths. Another idea of the MLPT is that you don't need to create big pointing model when you use it. You make basic pointing model with several points so that you can make your polar alignment and goto accuracy is good but after that the MLPT creates local pointing model for the object that you will image. I always have laptop with me on the field so that is not a problem.
6" Baby PowerNewt ES 152mm Achro iOptron iEQ30 QHY12 Lodestar & 50mm Borg guidescope Luck
My Astro Photos
14.5" Starmaster with ServoCat and Argo Navis 1966 Unitron 4" Model 152 EQ Tec 140 TV NP101 f/5.4 APO Telvue .8 Focal Reducer FLI ML8300 and CFW-2-7 filter wheel Astrodon Gen2 RGBL 2" filters Baader 2" Narrow Band Filters Borg 50mm Guide Scope/ATIK Titan Guide Camera AstroPhysics AP900 Losmandy GM-8 Gemini
10Micron GM2000HPS, 10Micron GM1000HPS, SW NEQ6 Takahashi FSQ106 EDX III, SW 190MN, TS Riccardi 130 f/5.2 SBIT ST-8300M, QSI 683wsg8 SX Wheel, Baader 2" filters, Baader 36mm filters, Astrodon QSI filters http://astro.frejvall.se
My astrophotography website
Quote:Any mount that doesn't require guiding is going to require you to build up a pointing model.
Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
Quote:Quote:Any mount that doesn't require guiding is going to require you to build up a pointing model. Not really. a pointing model might or might not be required, but it has nothing to do with the mount's lack of periodic error or drive system. It has to do with the go-to alignment system used.
LX850 blog: www.LX-850.com
personal website: www.wadsworthobservatory.com