12.5 & 10" Dobs, 5 Small scopes, 2 Classic Scopes (Sears 60mm, Tasco 60mm), 8x40 10x42 10x50 12x50 15x70 Binoculars
Job 9:9 He made the Bear, Orion, and the Pleiades, and the chambers of the south.
Psalms 147:4 He determines the number of the stars and calls them each by name.
David Cotterell Toronto, Ontario "If an observer actually sees an object, there is no point in referring to a formula to find out whether he ought to see it; and if he fails to detect it, no formula will ensure his success." - W.H. Steavenson 8" f/15.5 TEC Maksutov - 16" f/5 Teeter/Zambuto Dob - TEC 140 - AT 65EDQ APO Refractor - Astro-Physics Mach 1 GTO Mount - iOptron ZEQ25 mount - Discmount DM6 - Canon 60Da
AS of NSW
AS of Hunter Valley
Fact: I like reflectors and big ones. All the refractors I own are either finderscopes, binoculars, or riflescopes.
18"/F4.5 Obsession #1333 fully optioned (OMI Optics)
14"/F4.5 SDM #33 fully optioned (Zambuto Optics)
10"/F5.3 SDM #50 fully optioned (Suchting Optics)
Pentax XW's, T4 & T5 Naglers , UO HD orthos, 6mm Delos, 8mm Radian, 8.5mm Pentax XF, 13mm Ethos. 12mm Celestron Illum Astrometric eyepiece. Rainbow Optics Spectroscopic Eyepiece Set. Orion Optics UK 250 lpi Ronchi grating eyepiece. 2" Astronomiks UHC, OIII & H-Beta filters, 2" DGM Optics NPB filter. 2" Variable Polariser. 2" Hoya colour filters.
Leupold 10x42 & Pentax 16x60 binos.
Quote:Bob I am looking at a 15" truss dob.
Quote:Quote:Bob I am looking at a 15" truss dob. Which design, who built it? The scope design and construct is the critical thing here, moreso than the aperture.Cheers,
George N Obsession 20 Optical Guidance Systems 10" F/9 R-C Cass 6" F/5 & 8" F/8 home-made Newts Explore Scientific 127mm ED MI-250 mount Denk II bino-viewer, with PowerX and Newt reducer, Member, International Dark-Sky Association
6'' Orion SkyQuest f/5 12.5" Astrotel truss dob f/3.3 20" Super FXQ Starmaster William Optics 80mm ZenithStar ED II 1850/2500 Observing sessions grand total for 2013, 49. So far in 2014, 11
Home made 16" f5 Terry Ostahowski optics - ArgoNavis/ServoCAT
ES 30 mm, Ethos 21, 13 and 10 mm, Paracorr II, Antares Barlow 2" 1.6X
2" DGM NPB filter
2" Catseye Cheshire/Sight tube - 2" Howie Glatter laser + Tublug
Quote:I've always been curious as to how the servocat system deals with a dob's altitude balance i.e. does the use of the servocat eliminate this problem completely?I imagine this would be an issue when the clutches are disengaged and the scope needs to be moved manually?