Celestron C8 Adv. SGT, Vixen R130Sf on Astrozap EQ, Modified DS2090, Modified NexStar 102GT Zhumell Dual-Speed Focuser w/ wireless control Meade 5000 2" Dielectric Diagonal - Vixen Flip Mirror TeleVue Bino & 2X Amplifier Meade 5000 SWAs & UWAs
Orion SkyQuest XX14i Celestron Nexstar 8SE Kson 1026ED Celestron C102GT
My eyepieces are made from the waste product of exploding stars. 10XTi 102XLT ST80A(2" Focuser) XW: All; XO: 2.58 Televue: Naglers-T1 Smoothside-full set, 17T4,12T4,Ethos 17,4.7; plossels-40,32,20,17,&7.4mm; Pans-22,24mm; Delos-6,8,12,17.3mm ES100: 5.5,9*,14,20 ES82: full set ES68: 16,20,24,34 NLV: 5,9,10,15 Ortho: HD-7,9; OPS-9,12 Meade RG 7mm Other: Pentax 12.5K(.965), 10mm Parks Zoom: Nag3-6 *=on b/o DAS Dark Site
Quote:The inside tube diameter of the 102GT is 97.05mm, while the outside diameter is 100.05mm.
SteveCarpe NoctemBushnell 10x50 Seymour solarized binoculars.Bushnell 12x32 moon and terrestrial binoculars.Celestron: 102-GT Refractor OTA on a CG-4 GEMAstro-Tech Value Plössl 32mm, 20mmZhumell Z series 14.5mm, 9mm, 5mm+42° 18' 37.39", -122° 52' 3.76"
Never argue with a fool.Onlookers often can't tell the difference.
Quote:BTW the 100.05 front convex lens element surface is a aperture restriction, but don't forget that the 97.05mm rear aperture opening isn't really a restriction as the light is cone shaped and already narrower by the time it leaves the rear concave/plano lens element surface.
Quote:Quote:BTW the 100.05 front convex lens element surface is a aperture restriction, but don't forget that the 97.05mm rear aperture opening isn't really a restriction as the light is cone shaped and already narrower by the time it leaves the rear concave/plano lens element surface.
I definitely agree with you. It would be nice to have a way and calculate the diameter of the "top" of the light cone behind the lens. Any links or resources on that?
Quote:Thanks for this review! I was tempted to buy one of these when the price had dropped so low, but I already have the Meade 90mm scope you've compared it to.
Your comments about the actual increase in "light-gathering" power over the 90mm made me realize that the Meade 90mm is "good enough" for me, considering other scopes I have.
Incidentally, I picked that scope up from Telescope Warehouse on eBay at a ridicoulsly low price. For that price (under $38), it was as good a bargain as the 102mm, if not better!
/*/-=[ Michael ]-=/*/Dark site scope: Meade 8" f/6 DobWeeknight scopes: C9.25/iEQ45M, C102/LXD-75(I am looking for a 1980s Edmund Scientific 3" f/10 red-tube reflector, PM me if you have or know of one!)
Texas, USA ******************* Orion ST80 127mm F8 Burgess Refractor 102mm F9 Achromat Refractor 8" F6 Dob 8X21, 8X30, 8X42, 7X50, 10X50, 15X70 Binoculars (Psalm 19:1)
“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:The Monokote looks amazing. Wow. Definitely favoriting this thread.
I would definitely love to hear additional details about the Monokote film. I'll see if I can find any previous posts via search.
Quote:Doc, that looks outrageously cool. - Jim
Celestron NexStar 102 f/9.8--Celestron 80mmED f/7.5--AT72ED f/6--Vixen A 70 lf f/12.9 (Soooo Pretty..) c. 60s Tasco 15te (My $20 Vintage Scope) Vixen Polaris Mount, Vixen Porta II
Quote:The Astrozap is equivalent to the CG4. The CG5 features 2" tripod legs, the Astrozap is only 1.5".This is not to say that it does not support the 102GT adequately. It does and it is a perfect match. Proper balancing requires that you slide the mount's counter-weight half-way down the shaft. Then it works fine.
Thanks for the wealth of info in this thread. I have a question on the AstroZap. If I am to bring it for use in tropical regions with latitude range between 10-15 degrees, do you think it will affect the stability of the setup (with the C102 F9.8 OTA)? It seems a great value.
What about its stability supporting a 6" F5 reflector OTA?
Thank you in advance for the info.
Quote:Quote:Doc, that looks outrageously cool. - Jim I agree. Absolutely great!
Scopes: Meade LX90UHTC, NexStar 6SE, LinOptics 6" F5 newtonian, Nexstar 102GT, ST80 Mounts: Vixen Starguy Eyepieces: Scopetronix MaxView 40, Celestron Ultima 30mm, Orion Highlight Plossl 26mm, UO Ortho 12.5mm,7mm, UO Klee 2.8x barlow, Celestron Ultima 2x, TV Powermate 5x, Meade LPI
Quote:I just found out that the AstroZap mount can be bought from other dealers too, and Telescopes.net quoted me $209 (including tax). I will be doing some more shopping to find the best deal .
Quote:Dr. F, your "Wet Feet" review of the Astrozap mount (link here) was excellent! After reading it, I'm rather inclined to pick up one of those mounts myself; it seems exceptionally well-suited to use with the 102GT. Many thanks!Fred
Quote:I hope I'm not breaking protocol, as I have asked this in another thread, but how does the Astrozap EQ compare to a CG4 which sells for nearly a hundred bucks more. I assume there must be a catch.
Celestron Nexstar 102GT & Vixen A80Mf (mounted on Meade LXD75 and iOptron CubePro 8200 respectively) Bresser Hunter 7x50, Meade Adventure 10x50
Quote:DrF, I'm jealous - such a mod of the 102GT!
Quote:DrF, thank you for the response on the Monokote. To cover the OTA, was just the hot air gun sufficient or did you also need the iron?
I am not planning on applying Monokote to the C102, but do have a small collection of vintage scopes that I would be very interested in Monokoting if it is a viable solution.