I think you're worth a double serving of happiness!Tal-200K (#199) with JMI NGF-Mini2M focuser on GEM3 • Astro-Tech AT80ED • Orion Sirius EQ-G with wireless EQDIRECT • Astro-Tech Voyager • Celestron Regal LX 10x42 • Helios 15x70 ATM projects: 14" f/5 truss Dobson: first light Jul 1, 2011 - currently in 'tweak & widget' mode
David W. Knisely . . . . . . "If you aren't having fun in this hobby, you aren't doing it right." Hyde Memorial Observatory http://www.hydeobservatory.info Prairie Astronomy Club http://www.prairieastronomyclub.org
Theoretical Amateur Astronomer (currently without scope)
Quote:I can't wait to hear your thoughts on your refigured mirror.
Happy owner of--
A Mag 1, 12.5 inch Porta Ball
A Dual Axis Equatorial Platform
A PST Double Stack
Quote: I have the XX14i out with the new optics.
Quote:Very nice review. You mentioned the 12.5 inch Portaball. Have you owned one? This is where I ended up after a life time of buying and selling telescopes.
Quote:David,Thanks for your detailed review and congratulations on your outstanding new dob. Your photos, descriptions and impressions are of great interest to us and provide us with insight and details that are not obtainable from the retailer's product descriptions. Regarding the size and weight - I remember my first impression on seeing my much smaller dob for the first time and thinking OMG what have I done? Now, it seems to be just the right size for me. The sturdy, rigid construction of your XX14i will likely be a blessing in the long run by holding collimation and resisting buffeting of breezes. Those characteristics will allow you to eventually be able to ignore the instrument and concentrate on what you are actually trying to see. That's why I am sure that it will become the perfect complement to your skill and experience in observation and a capable, new window into the night sky. Your choice of optician was obviously the right decision. And the outcome of the re-figuring process raised a couple of questions in my mind that you may wish to share with us: Did you choose to have the mirrors recoated with enhanced aluminum as they were in the original configuration?How did you re-attach your secondary mirror to the holder so that the outstanding figure of the secondary would be preserved?Best regards------C
Orion XT12i with Swayze-refigured primary & Protostar secondary
Televue NP101 refractor
William Optics Megrez 90 refractor
Universal Astronomics Deluxe Mounts
Quote:If David adds a little height to the springs, and increases the thickness of the cork pads behind the mirror to 1/4" (available in all hardware stores), the focal point of the mirror will move out 1/4-3/8" from where it is now and solve his problems. for infocus, that is.
Quote:I need to flock the interior of the metal OTA segments, plus I have to install some sort of baffle around the base of the trusses, as even with the shroud on, light can come into the tube from the middle through the openings in the rear OTA's truss attach points (lousy design)
Celestron Omni XLT 102ED • Celestron CPC‑800 GPS • Zhumell Z10 Dobsonian
"Relax, don't worry! Have a homebrew!" - Charlie Papazian
"I have been paddling in the shallows of a great ocean of knowledge." - Sir Isaac Newton * * 15" F4.55 Starsplitter Dob & a Denk II binoviewer * * http://peaceofsky.wordpress.com/ Pacheco State Park Fremont Peak
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.
Quote: It would have to be mounted just ahead of the front end of the tube, so I am stuck with Orion's silly double-side sticky foam tape method of mounting the secondary mirror.
Quote:Quote: It would have to be mounted just ahead of the front end of the tube, so I am stuck with Orion's silly double-side sticky foam tape method of mounting the secondary mirror.
Why can you not remove the foam tape and use 3 dabs of silicone?
An alternative to the Protostar holder/spider is the Astrosystems unit.
Quote:David, What about the pyramid geometry spiders you see on UC scopes that don't even have a UTA but just a truss retaining ring with focuser and pyramid spider attached.
Quote:Wouldnt something like http://www.smarthome.com/78540/Plug-In-9-Volt-Power-Supply-Battery-Eliminator-9V-ADAPTER/p.aspx solve the battery problem?
Telescopes and Guitars... Can't have too many of either one.
Obsession 12.5" Classic Canon 10x42L IS Binoculars