Meade LX200GPS 14", Meade LX200ACF 10" Celestron C8 SCT w/Hyperstar (CGEM Mounted) Explore Scientific AR152, 127mm APO, 102mm APO, 80mm APO AT 6" RC, William Optics GTF 102 Lunt LS60TDS & Cak B1200 QHY10, ATIK 460EX(M), 450C, Starlight Express H18 w/FW and OAG Orion StarShoot Pro V.2, Orion StarShoot SS III, NexImage 5 & PG Chameleon Meade LPI, DSI-C 1, Lodestar & SSAG (autoguiders) Canon XSi Digital Rebel Hap Modded Images Plus 4.0, MaxIM DL Pro 5.14, BackyardEOS
7 X 50 Binoculars 102mm f/9.8 Refractor 14" SCT w/ CGE Pro 6" SCT 180mm f/15 Mak Atlas EQ-G GEM Pentax, ES, Baader Ortho & Sterling EPs.
Quote:I am looking to also see about having a second tension screw added to the focuser by a buddy of mine that does machining. This will limit the tipping of the focuser draw tube I recon.
Quote:I think that someone somewhere here bought teflon and replaced the focuser gliders, but can't remember that...a little help here. Perhaps on a ST80 thread...Regards,Bob
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:no they werent. good idea, but would make aligning the lenses afterwards a bit tough possibly. What would you recommend blackening em with?
NexStar 8SE; Stellarvue SVR90T; Celestron 102GT; Orion ST80 Orion 9x63, Oberwerk 15x70 binos
And there they still stood, obscurely commemorating man's triumph over time and matter and the triumph of time and matter over man. -- Aldous Huxley, on the Mayan stelae at the Quirigua ruins
Kmart 40mm-Thanks Mom|Jason60mm-Thanks Dad|C80SS-Thanks Wife|C90|C102|C6XLT|AP130EDFGT|C-11XLT EQ-2|EQ-3|CG5GT|Mach 1 & Eagle "For once you have tasted flight, you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return".-Leonardo da Vinci "We're all in the gutter, but some of us are looking at the stars."-Oscar Wilde ~RIP Dad, you were my best friend...Godspeed!~
Quote:"Buy black 'foamies' from Jo-annes and make a longer dew shield"
What exactly are these? Good for dewshields eh?
Quote:Quote:I think that someone somewhere here bought teflon and replaced the focuser gliders, but can't remember that...a little help here. Perhaps on a ST80 thread...Regards,Bob Reworking a Synta Focuser
Quote:2. I had to rotate the lenses to remove astigmatism. Took days but worth it.
Scopes: Meade SN6, 10" Dob, Meade LS6, 5" reflector, 8" reflector, 102GT
Mounts: LXD75 and LXD55
Camera: SBIG 8300M, Baader 7nm Ha, OIII, SII, LRGB
Quote:some say that if you have a digital micrometer, you can line up the thinnest part of one of the lenses with the thicker part of the other. I didn't have one and went the old fashioned way.I kept the flint stationary inside the tube while gently loosening the screw on part of the plastic cell. This really sticks the first time you loosen it so be prepared for the lenses to jump out at you. The lenses should not be have this tightened down so hard anyways as it will pinch the outside of the optic. Afterwards I tilt the tube down to let just the crown pop out. I wear rubber gloves to cut down on fingerprints. I marked the crown with a perminent marker for reference(12 o'clock position.) Then since you have astigmatism at your current spot, rotate about one hour on the clock face. Then you retest. Repeat, retest, repeat retest, etc. When you find your sweet spot, which might take a while, you keep it there. Next time you remove both lenses for cleaning, you want to mark the flint where it lines up with the line on the crown.I hope this makes sense. If not I am around the boards a lot.
Celestron 8" Nexstar GPS XLT Meade 8" f/6 newtonian on GEM-New GSO Mirror StarBlast 4.5" Dob XT12 IntelliScope Dob with COL Vixen A80MF achro Celestron NexStar 102mm GT OTA
Quote:The only things I plan to do are:Make a longer light shield with either cardboard/flat black paint/duct tape or black foam as described above.Attach a Rigel RDF. Rubber bands will do until I find the best spot for it.Add some weight to the front of the tube so I can use the 2" diagonal and EP's. I have a spare Telrad base and might use rubber bands to put my Telrad at the front of the tube for now, and wait until later to mount the Rigel RDF.Eventually get some 4" rings when I have some spare cash. Removing the short dovetail bar and using 1/8" plugs on the existing screw holes is a nice touch.The New Scope Curse has prevented first light so far so I have plenty of spare time to play around.Tom
Quote:Like most of your I guess we like messin' with $59 OTAs, especially when the skies haven't been clear for what seems like months. Many of us bought the 'special' deal 102mm f/9.8
from OPT. What are you doing to yours to 'improve' it?
1. Remove with Synta Grease and replace with Pete's Red grease. I used Naptha. Is there anything better?
2. Remove short dovetail. Surprise, paint wasn't cured and two lines appear in finish from pressure of dovetail.
3. Insert 1/8" black hole plugs into dovetail holes. (plugs are on their way; not here yet.)
4. Replace metal focuser ring screws with black nylon ones so as to not mar accessories. M4's if I remember correctly.
5. Install flocking on dew shield.
6. Buy black 'foamies' from Jo-annes and make a longer dew shield.
7. Use a red dot finder b/c if I can't see it in that, its not going to be useful since I'm in a whiter than white zone. My light pollution laughs at your light pollution!
8. Rings and a long dovetail. Have to balance this thing!
9. Find some big honkin' jars/cans with plastic lids to fit and make aperature masks to test CA/detail reduction vs. apo or fringe filters on bright objects.
I think that someone somewhere here bought teflon and replaced the focuser gliders, but can't remember that...a little help here. Perhaps on a ST80 thread...
I would love a new focuser, but I don't think it would improve any visual qualities? Or?
Can you take the objective out of its cell and are the edges blackened?
Quote:and here's a picture of the 1/8" plastic hole plugs plugging the dovetail bolt holes.
Celestron EdgeHD 8 + AVX | Sky-Watcher Pro 100ED APO + Vixen Porta II + Oberwerk Tall | Celestron NexStar 6SE Fujinon Polaris 10x50 FMT-SX | Bushnell 10x42 Legend Ultra HD
Quote:Quote:and here's a picture of the 1/8" plastic hole plugs plugging the dovetail bolt holes. Bob, thanks for reviving the thread. Where did you get your plastic plugs?
Quote:Quote:"Buy black 'foamies' from Jo-annes and make a longer dew shield"What exactly are these? Good for dewshields eh? They are 2 or 3mm thick foam sheets that come in all colors, black being the one of choice. I buy the 3mm ones and have made dew sheilds for my CPC1100, my C14 and now my 102GT by gluing them together and then velcroing a strip. I just wrap it around the scope, join the velcro and it stays on the end of the OTA. The foamies aren't super stiff, but they're stiff enough to hold a round shape. Especially true on a 102mm scope. You can also roll it up for easy storage. They cost about 1-2 bucks each, depending on the thickness and if you have a coupon from JoAnnes' You can also use them to line storage boxes or shapes that touch your telescope so as to not scratch the OTA, etc.bob
Quote:"Buy black 'foamies' from Jo-annes and make a longer dew shield"What exactly are these? Good for dewshields eh?
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow
Quote:The orange ring on the dew shield was annoying me so I unscrewed the dew shield, removed the ring and covered it with a thin black electrical tape. I trimmed the tape with a sharp knife so that it just covered the sides of the ring. It took just a few minutes. Now it doesn't look as like a toy as much.
Quote:Quote:Quote:and here's a picture of the 1/8" plastic hole plugs plugging the dovetail bolt holes. Bob, thanks for reviving the thread. Where did you get your plastic plugs? Hi, Got them on Ebay. I've used them in many of the tube overhauls....Lowes has the bigger ones, but not 1/8"Glad to help.Bob
Meade LS8 ACF F/10
Celestron C102GT F/9.8
Orion SkyView Pro Goto Mount
ES AR152 F/6.5
Celestron CGEM Mount
Too Many Eyepieces To List
"A telescope is either good or cheap, not both" - but sometimes you get lucky!
Quote:Has anyone removed the original short dovetail from the C102GT and attached a longer dovetail directly to the OTA? I think I'd rather do that than order new rings. I had a Celestron 4" f/9.8 achro before that had rings. They always seemed like overkill for that scope. On the other hand, a refractor in rings would be more adjustable for balancing than one with an attached dovetail, even a long dovetail.Mike
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
Binos: APM100 | Obie 20x80D3 | Resolux 15x70, 7x50 | Nikon AE 12x50, 7x35 | FMT-SX 10x50 | Canon 10x30 | Vanguard ED 8x42
Mounts: AVX | Orion Paragon | Tecnosky eLLe
Telescopes: XT8g | AT6RC | Onyx 80EDF | 102GT | ST80
1.25" EPs: Hyperion 8, 17mm | ES68º: 20, 24mm | ES82º: 4.7, 6.7, 8.8, 11, 14mm
2" EPs: Meade 5k 82º: 24, 30mm | ES100º: 5.5, 9, 14, 20mm