Photo: Qhy9 mono + qhy 5x2" filter wheel and Baader 2" LRGB, Ha, O3 and S2 filters , Meade DSI Pro 2 as guider, TS 9mm off-axis guider Binoculars: Nikon Action 12x50 Telescopes: Skywatcher Evostar 120ED f7.5 APO + TS 2" flattener Mounts: HEQ5 Pro Eyepieces: Nagler 11mm type6, Pentax XW 7mm, Televue 2X barlow 1.25"
Clear skies - Jim Crazy PNW imager !
A-P Mach1 on 12" concrete pier - ROR structure.
Tak FSQ85-EDX, Tak FS-128. Orion 8" f/3.9 w/MoonLite motorized - MPCC MkIII CCD:
SBIG 8300M/FW8, Astrodon 36mm LRGB, 5nm Ha, 3nm SII, OIII - Canon EOS 6D unmod SSI3, SSAG,
Skytools3pro, MaxImDLpro, PSCS5, PSPpro, TheSkyX, TheSky6, BYE, StarTools
Orion XX14g -for visual- diags, ep's, accy tubes, Binocs .
“I am the only person to ever ace a 1951 USAF resolution test. My 'to observe' list says 'done'. I do not use charts or atlases when I starhop; men do not use maps. One of my sketches won an SBIG deep sky imaging contest. I am the life of star parties I have never attended. I never say anything looks like a faint fuzzy - not even a faint fuzzy. Pilots aim green laser pointers at me. Don Pensack proofreads my CN forum posts.” - The Most Interesting Astronomer in the Universe
Quote:I store my 140 oil spaced scope horizontally with no issue, but if I had a larger scope (180 for example) I migt consider storing the OTA vertically.- Jim
Quote:I have stored my TEC200 horizontally for five years over 100 degree F temp swings seasonally. The lens looks brand new.
"Coffee leads men to trifle away their time, scald their chops, and spend their money, all for a little base, black, thick, nasty, bitter, stinking nauseous puddle water." ~The Women's Petition Against Coffee, 1674If it ain't broke, fix it 'til it is.
Quote:Well, if you put any credence into the findings reported on astro-foren.de, which were pretty compellingly demonstrated with bench data, there is at least a possibility that the flimsy edge tape on a truly large, heavy oiled lens doesn't hold the elements 100% statically, and when stored horizontally, the elements decenter slightly, causing the astigmatism reported.The conclusion of that report, if I recall correctly, was that when the scope was stored vertically, lens-down, for a period, it bench tested nearly perfectly.So if you have a big, heavy oiled lens, and put any stock in those findings (which for me have greater credibility than anecdotal claims of "no problems" for horizontally stored scopes, including my own) then there's not much harm in storing the scope vertically with the lens down...unless you're a klutz, I suppose. My TEC 140 stands on the end of its Scopeguard case pretty stably, though it's more convenient for me to put it on a shelf with other boxed OTAs than store it in this manner.Regards,Jim
Quote:Jim, if the tape starts to fail, and is the means to keep a lens centered, keeping it oriented vertically may not help.