Astronomer and Golfer - C11 and Vixen 140mm NA140SSF Refractor - G11 mount on permanent pier (in my moderately light polluted back yard) - Older Meade 8" SCT for travel
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Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
Ed Thomas Deep Space Products www.deepspaceproducts.com
Quote:Usually, the secondary mirror has a cork backing. Not much chance of warping it. Just keep the screws snug at all times.
Quote:If you mean what is happening to the collimation when you turn each screw, then this might be helpful: http://www.asterism.org/tutorials/tut14-1.htm.
Meade LS8 ACF Meade 2" Diagonal Apetura 10" Tweakers Package Meade ETX-125, ETX-90 for Solar Celestron 80mm APO PST Meade SWA - 34mm,28mm,24mm,20mm Brandon 32mm, 16mm Vernonscope 40mm Erfle 2" ES 14mm,11mm,6.7mm 8.8 Nagler 13mm T6, Pan 19mm Meade 12.4 Pl,9.7mm, 15mm SP Meade 2x Shorty Barlow Powermate 2.5x WO Bino Viewer, 20mm 66* pair Denkmier 2 Super System Meade Nebula Filters Meade 9x60 Bino Vivitar S1 8x42 Bino Canon T2i, 18-55mm, 50mm 1.8, 55-250mm
Keeper of the Swamp Gas Observatory "This R2 unit has a bad motivator" AR127, CG4 CGE1100 1984 tasco 60mm 49TR F/13.3 refractor 1976 Vixen Polaris 80mm F/15 refractor Denkmeier Big Easy BV'er Astro-Tech Titan 38mm 70* Astro-Tech Titan 20mm 70* Astro-Tech SR6 12mm 60* Meade MA25mm Jap. Meade MA9mm Jap. TMBpII 5mm ES 1.25" FX
Quote:Since I am doing this on a C11 I can't reach from the focuser to the front of the tube. So I just took a roll of masking tape out and ran a piece of tape from the outside of the secondary to the edge of the scope. That made identifying the proper screw adjustment quite easy.
Celestron EDGE 11/CGEM | Stellarvue SVR90T-25FT20MM ES100 | Televue 31MM Nagler T5 | Televue 11mm Nagler T6 | Televue 2X PowerMate Sky Safari 4 | SkyFi