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
C11 Edge HD, C925 XLT TEC 140 (#352) w/ AT65EDQ Skywatcher 100ED w/ WO66SD ZenithStar, ES 80mm Apo Sirius, Atlas EQ-G, "Atlosmandy" Pro AZ/EQ-G, T-Rex Apex,Porta II DBK21AU04, DBK21AU618, DMK21AU618, DMK31AU03, ASI120mm/mc, Hutech 500DH Beaglehaven Observatory (BYO #168)
Quote:If you are guiding, why are you concerned about getting ~ 1" PEC?
Quote: I saved up for a $600 mount, it stunk. So i start saving up for an $800 mount...it just wasn't good enough for the weight I might put on it since rated weight and imaging weight are different...So then I saved up for a $1300 mount...but Now there's a new one on the market for $1600 that's better. Built an observatory instead. Now a $2000 one....save up for the $2000 one and it's not any better than the $1300 mount--which isn't good enough, so save up for a $3000 or $6000 mount!
Quote: Perhaps I'm overthinking this...I should have an Atlas already and be using it and learning more.
Dark Arts Observatory - Brockport, NY - Skyshed POD XL5 with iOptron iEQ45 Mount
Scopes: C8, C5, SV110 ED, EON-72 ED, ST 80, ATRC6, Megrez 90
Quote:I think if you could produce these results from an LXD55, you must have the patience of a saint.
Quote:The Atlas is simpler...so less harmonic problems. Makes sense, more error is removed via PEC in theory. IEq45 and CGEM have more harmonic error that can't be removed with PEC, makes sense. CGEM DX is not really any different under my particular circumstances. An unlucky few seem to have *unfixable* harmonic error on CGEM and IEq45...that's what scares me. The last thing I want to do is drop all of this money on a bigger mount and more imaging equipment in order to get something that performs only slightly better than my LXD55!
Deep Space Products
Quote:I spread my mount costs over several years (and frankly, had fun with DIY hypertuning and bearing replacement and obsessively measuring PE).
Quote:Quick update.... After the mandatory 11 day waiting period of rain, clouds, dreerienes and apologizing to family for bring such horrible weather by buying new equipment...I've pier mounted, accurately polar aligned, and PEMPro PEC tuned the mount.After all is said an done I'm down to just shy of 11 arc-seconds peak-peak of periodic error before guiding without any visually fast movements in RA. I had been using an LDX55 for 10 years now as of this month and I've got to tell you, everything is four times as easy, 4 times more accurate, and all around this CGEM mount just gives me the warm fuzzies. Perhaps I'm more easily amused simply by fighting the 55 for so long.I'll be purchasing a VSBS and start some guiding here shortly.