Nytecam 51N 0.1W Meade 30cm LX200 astrograph+C8+Ha+CaK PSTs+spectrographs SX M9+Lodestar-C+M CCDs/Canon 1100D DSLR My Meade astrograph-colour deepsky My supernova discovery My dome build/spectroscopes/DSO images/Lodestar colour images & videos
AT6RC; C6R; 8" R200SS; 10" SNT; RV6; PST Vixen GP + Starbook-S Warped LXD55 G11 Gemini-1 & DSC Gone! HGM-200 Gemini-2 Orion Starshoot DSCI2; DFK 41AF02 Sky Commander 4 SkyShed POD XL3 14.5" f5 folded Newt Finished. Now in storage. Mount for 14.5" Portable obs on 7ftx16ft utility trailer wi 8ft dome Trailer Plans Approved, Jig Built! http://cleardarksky.com/c/MCAOobMDkey.html
Tim Gilliland http://astrobin.com/users/Timgilliland/
Quote:How much ground clearance do you like under an equatorially mounted Newton telescope?I have read that the scopes need to be up some (the article did not say how much) to avoid something called ground currents. But that article was written in the days before electric fans were mounted on the back of the telescope tubes. Can we now bring our scopes down until they are sweeping the Earth to minimise eye piece height?
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow