Tom Karpf (tkarpf) Vice President, Astronomical Society of Greater Hartford www.asgh.org
My eyepieces are made from the waste product of exploding stars.
10XTi 102XLT ST80A(2" Focuser); President, Eypieces Anonymous, Denver Chapter (Hello, I'm an eyepiece junky, what's your excuse?)
DAS Dark Site
Orion xx14g Dob CPC 1100 w/Skywatcher 80ED piggybacked Coronado PST TMB 92L refractor AT Voyager mount Nexstar 6/8 mount Denk Big Easy binoviewers Oodles of eyepieces and other optical gadgets Past scopes Meade 8" reflector and 8" SCT
Quote:I use the Orion RACI finder on my Celestron scope and it works fine. Bed sure to order the Orion SCT-style finder shoe since the finder will not fit in the stock Celestron shoe.
Cliff Mygatt Astronomical League Master Observer
Astronomical League Lunar II & Constellation Hunter programs national coordinator President, Olympic Astronomical Society Bremerton, WA
Orion XT12i Fully flocked with Zambuto Mirror, Protostar quartz secondary and Moonlite CR focuser
Meade 8" LX10 SCT Fully Flocked with Magellan I DSCs
Orion 120mm and William Optics 80mm Refractors Ethos 21mm,17mm,13mm,10mm,8mm,6mm,4.7mm,3.7mm Nagler 31mm and paracorr type 1
Orion XT12g 12" f/4.92 GoTo Dob Orion 9x50 RACI - Green Laser Pointer Orion 4.5" f/4 EP: ES82 30mm, ES68 24mm EP: Hyperion 21, 17, 13, 10, 8, 5mm Various filters, including Skyglow, UHC, O-III Celestron Ultima 2x Barlow Celestron 12x80 binoculars & mount
Quote:Yes i did, but I'm not sure what is the best choice for me. So thats why I'm asking you Casper
Casper,Having a finder that produces a correctly oriented image such as one would see in a binocular but that is presented to the observer at a right angle (RACI), is the best accessory that I have ever installed on my telescopes. One with a five-degree (or a little more) field of view is just about right. You are on the right track in my opinion. Here is another site for comparison shopping: AgenaAstroEven with a 'go-to' mount that doesn't require continual navigation via finderscope, I find it indispensable for seeking out and exploring those nearby objects not listed in the hand-controller's database. I find the confinement of ‘go-to' is like taking a train tour of the night sky – I’m only able to visit the places where the train stops. By comparison, the finderscope can be very liberating when it is comfortable to use; and, hence, my appreciation of the opportunity for right-angle viewing.I have not found illumination of crosshairs to be essential. It is very rare that I have been in a dark-enough location where I was unable to see my plain crosshairs but YMMV.One characteristic that surprised me about using my RACI finders is that they do not point well. When seated at my dobsonian telescope (wide aperture, low to the ground), I cannot tell where the finder and telescope are pointing in the dark. That fact makes it difficult for me to get the telescope pointed to a specific object that I can see plainly with my unaided eyes. I overcame my pointing problem by installing a very inexpensive red-dot finder on top of the RACI finder. Problem solved! The ‘pointing’ problem manifests itself to a much lesser degree with my refractor which seems to have its own natural pointing ability.Were you to find this pointing issue to be a factor in your case, you may find yourself wishing for some type of auxiliary pointing device. And, of course, it wouldn’t help with your initial alignment as much as you expect. On the positive side, it’s not likely to be a show-stopper in the alignment of a refractor on your CGEM. Clear skies to you,-------C
"The heavens declare the glory of God; the skies proclaim the work of his hands." Psalms 19:1