Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Celestron 102GT revisited

  • Please log in to reply
60 replies to this topic

#1 droid

droid

    rocketman

  • *****
  • topic starter
  • Posts: 8,779
  • Joined: 29 Aug 2004
  • Loc: Conneaut, Ohio

Posted 22 July 2017 - 03:23 AM

Back oh between 5  up to 3 years ago, there was a lot of posts on the 102gt, most loved the cheap little buggers, but Im curious, how many still love and use them?

 

I picked up mine a couple years ago in the classifieds, I use it regularly.

 

Any one else?


  • CollinofAlabama and PXR-5 like this

#2 T1R2

T1R2

    Mercury-Atlas

  • -----
  • Posts: 2,920
  • Joined: 11 Jun 2013
  • Loc: NeverWhere, 35*N

Posted 22 July 2017 - 05:43 AM

I dont have one..but I like the fact that every time I hear Rick say "Carl" I'm going to think of your telescope...lol



#3 Bill Friend

Bill Friend

    Mariner 2

  • *****
  • Posts: 218
  • Joined: 16 Feb 2012
  • Loc: Maine

Posted 22 July 2017 - 07:11 AM

I still use mine and love it. Great value!


  • CollinofAlabama likes this

#4 bobhen

bobhen

    Soyuz

  • *****
  • Posts: 3,990
  • Joined: 25 Jun 2005

Posted 22 July 2017 - 07:12 AM

I bought one of the GT OTAs that were on sale for $59. Still have it. I use it mainly for white light solar observing and my club’s public star parties. The GT always impresses newcomers with its nice, sharp views of the moon and planets. It’s not unusual for the $59 GT to best 6 to 8-inch Newtonians and SCTs in our seeing here in PA especially if temperatures are falling during late twilight.

 

Bob


  • CollinofAlabama and REC like this

#5 *skyguy*

*skyguy*

    Soyuz

  • *****
  • Posts: 3,701
  • Joined: 31 Dec 2008
  • Loc: Western New York

Posted 22 July 2017 - 07:43 AM

I purchased my 102GT refractor on a whim ($59). After using it a couple of times, I sold my ED80 APO scope! The views through the 102GT ... planetary and deep-sky ... were superior to what the ED80 would show. The small amount of chromatic aberration visible in the 102GT was not and is not an issue for me. I still have and use this very capable 4" refractor and I have no plans to replace it with a far more expensive 4" APO. . 


  • CollinofAlabama likes this

#6 Brollen

Brollen

    Messenger

  • *****
  • Posts: 470
  • Joined: 18 Feb 2012
  • Loc: Maryland, USA

Posted 22 July 2017 - 08:04 AM

I had one as well and for the close-out price it was an impressive scope. I ultimately sold mine in pursuit of more aperture, better glass and a shorter FL package. 

 

But I often wish I had kept it.


Edited by Brollen, 22 July 2017 - 08:06 AM.


#7 droid

droid

    rocketman

  • *****
  • topic starter
  • Posts: 8,779
  • Joined: 29 Aug 2004
  • Loc: Conneaut, Ohio

Posted 22 July 2017 - 02:48 PM

https://www.cloudyni...t/#entry5301728



#8 droid

droid

    rocketman

  • *****
  • topic starter
  • Posts: 8,779
  • Joined: 29 Aug 2004
  • Loc: Conneaut, Ohio

Posted 22 July 2017 - 02:50 PM

https://www.cloudyni...chro-for-cheap/



#9 belgrade

belgrade

    Viking 1

  • -----
  • Posts: 562
  • Joined: 05 Oct 2007
  • Loc: Far North SA, TX

Posted 22 July 2017 - 04:25 PM

Bought new, still have it, still use it.
  • CollinofAlabama likes this

#10 rguasto

rguasto

    Apollo

  • *****
  • Posts: 1,251
  • Joined: 18 Nov 2010
  • Loc: Long Island, NY

Posted 23 July 2017 - 08:37 AM

Still use mine and I am impressed with it every time. It is the king of bang-for-the-buck telescopes. $59 was just ridiculous. I should have bought a couple more.
-Rob

Attached Thumbnails

  • gallery_159290_4401_11035.jpg

Edited by rguasto, 23 July 2017 - 08:38 AM.

  • belgrade likes this

#11 mich_al

mich_al

    Fly Me to the Moon

  • *****
  • Posts: 5,902
  • Joined: 10 May 2009
  • Loc: Rural central lower Michigan Yellow Skies

Posted 23 July 2017 - 11:33 AM

Bought mine off CL for next to nothing.  Put some decent legs on the mount and use it with my solar scope.  Put a GSO focuser on it, some rings and a Vixen dovetail.  On a reasonable mount it's a respectable OTA.  I've since bought a 4" Tak but the 102 gets its share of use.


  • CollinofAlabama and DanielJoynt like this

#12 precaud

precaud

    Fly Me to the Moon

  • *****
  • Posts: 5,009
  • Joined: 05 Dec 2012
  • Loc: north central New Mexico

Posted 23 July 2017 - 09:20 PM

Mine is my grab-n-go frac. After reading here on CN that the lenses tend to be quite good, that Celestron makes (and has made) so many of these, they "have it down", I bought it on sale with the GT mount. Was pleasantly surprised. Can easily do 250x on the moon. The DPAC test confirms the lens quality. Not absolutely perfect but awful darn close! - the best I've measured yet

Attached Thumbnails

  • dmp1all.jpg

Edited by precaud, 23 July 2017 - 09:22 PM.

  • Bill Friend likes this

#13 Sonomajfk

Sonomajfk

    Mariner 2

  • *****
  • Posts: 299
  • Joined: 30 Jun 2012
  • Loc: Cloverdale, CA, USA

Posted 23 July 2017 - 11:04 PM

I got my 102GT less that a year ago, and I love it.  It's become the scope I use the most, and while I like the other scopes, I'm really in love with this one. It's just the right size, super sharp images, easy to use, even on my funky mount.  I'm keeping it for good.

--John.


  • CollinofAlabama likes this

#14 niteskystargazer

niteskystargazer

    Cosmos

  • *****
  • Posts: 7,569
  • Joined: 05 Oct 2009
  • Loc: 41-43'-28" N 87-42'-39" W

Posted 24 July 2017 - 09:43 AM

Andy,

 

I use mine most of the time (when the weather is clear, and the moon is out of the way).

 

CS,KLU,

 

thanx.gif ,

 

Tom



#15 Sarkikos

Sarkikos

    ISS

  • *****
  • Posts: 31,202
  • Joined: 18 Dec 2007
  • Loc: Per sylvam ad astra

Posted 24 July 2017 - 10:02 AM

I have to confess I only used my $59 C102GT a few times when I first bought it.  My C80ED gives sharper and more contrasty images of planets, the Moon and double stars.  The improvement is not subtle.  

 

Besides, I like the smaller format of the C80ED much more for grab-n-go.  Also, the shorter tube is ergonomically superior when going from observing near zenith to near horizion, or vice versa.  A foldable camping stool is all I need for the C80ED.  A MicroStar head on a simple tripod is sufficient for the mount.

 

Just had to say it.  shrug.gif

 

Mike


Edited by Sarkikos, 24 July 2017 - 10:04 AM.

  • Bean614 likes this

#16 t.r.

t.r.

    Fly Me to the Moon

  • ****-
  • Posts: 6,158
  • Joined: 14 Feb 2008
  • Loc: 1123,6536,5321

Posted 24 July 2017 - 10:14 AM

Still have it, use it, love it ! And only $59 to boot! 👍
  • CollinofAlabama and Sarkikos like this

#17 epee

epee

    Soyuz

  • *****
  • Posts: 3,741
  • Joined: 30 Nov 2006
  • Loc: Suh-van-nuh, Jaw-juh

Posted 24 July 2017 - 01:00 PM

I paid OPT $100 and a 2" diagonal came with it. It has become redundant in my lineup since a recently purchased f/6 102mm is now my widefield scope, but I can quite bring myself to sell it.
  • Sarkikos and Sonomajfk like this

#18 REC

REC

    Voyager 1

  • *****
  • Posts: 11,724
  • Joined: 20 Oct 2010
  • Loc: NC

Posted 24 July 2017 - 01:37 PM

I echo what a lot has already been said. Since I have had it, I hardly use my C80ED, which was my Grab 'n Go scope. I could not pass up on that crazy close-out for $59. I bought a used WO heavy duty 10:1 focuser for it and I am able to use my binoviewer on it without changing the native focal length of f/1000mm. Great for the moon and hardly any CA is visible. Picked up a used VersaGo II, an 8x50 finder scope and it's a nice set-up. I usually use my ES 6.7mm for 150x on the planets and moon.

 

I am amazed how well it does on stars and clusters ect. Lot's of contrast and very sharp. Now, if only I could use it! Been cloudy for almost 2 months!



#19 REC

REC

    Voyager 1

  • *****
  • Posts: 11,724
  • Joined: 20 Oct 2010
  • Loc: NC

Posted 24 July 2017 - 01:39 PM

I purchased my 102GT refractor on a whim ($59). After using it a couple of times, I sold my ED80 APO scope! The views through the 102GT ... planetary and deep-sky ... were superior to what the ED80 would show. The small amount of chromatic aberration visible in the 102GT was not and is not an issue for me. I still have and use this very capable 4" refractor and I have no plans to replace it with a far more expensive 4" APO. . 

I'll have to do a side by side with mine and see if I come to the same conclusion as you? I don't use my 80ED that much anymore. Maybe I'll keep it for sweeping the Milky Way with a 4* FOV eyepiece?



#20 Sarkikos

Sarkikos

    ISS

  • *****
  • Posts: 31,202
  • Joined: 18 Dec 2007
  • Loc: Per sylvam ad astra

Posted 24 July 2017 - 01:45 PM

I paid OPT $100 and a 2" diagonal came with it. It has become redundant in my lineup since a recently purchased f/6 102mm is now my widefield scope, but I can quite bring myself to sell it.

And you would probably not get much for it, after shipping costs.  Maybe better to keep the 102GT and eventually give it to a grandchild or a beginner near where you live.

 

Mike


  • CollinofAlabama likes this

#21 Sarkikos

Sarkikos

    ISS

  • *****
  • Posts: 31,202
  • Joined: 18 Dec 2007
  • Loc: Per sylvam ad astra

Posted 24 July 2017 - 02:03 PM

I purchased my 102GT refractor on a whim ($59). After using it a couple of times, I sold my ED80 APO scope! The views through the 102GT ... planetary and deep-sky ... were superior to what the ED80 would show. The small amount of chromatic aberration visible in the 102GT was not and is not an issue for me. I still have and use this very capable 4" refractor and I have no plans to replace it with a far more expensive 4" APO. . 

To each their own, and there's no use arguing from personal experience.  But I don't get why anyone would prefer a C102GT achro to a C80ED ... or sell the C80ED and keep the C102GT. 

To my eyes the C80ED clearly has a sharper image and better perceived contrast for planets and the Moon.  The kicker for me is Jupiter.  I just need to compare the image of Jupiter through the C102GT (or my old C4-R) to that seen through the C80ED.  No contest. 

The C80ED is also excellent for double stars.  Great color, great resolution.  I don't see the C102GT doing better.

Will the 22mm additional aperture allow the C102GT to go deeper for deep sky than the C80ED?  I suppose, but not by much, especially when you consider the smearing of the image due to CA. 

Then you have the easier grab-n-go capability and superior ergonomics of the C80ED versus the C102GT.  Well, to each their own.  shrug.gif

Mike


Edited by Sarkikos, 25 July 2017 - 05:20 AM.


#22 Sarkikos

Sarkikos

    ISS

  • *****
  • Posts: 31,202
  • Joined: 18 Dec 2007
  • Loc: Per sylvam ad astra

Posted 24 July 2017 - 02:07 PM

 

I purchased my 102GT refractor on a whim ($59). After using it a couple of times, I sold my ED80 APO scope! The views through the 102GT ... planetary and deep-sky ... were superior to what the ED80 would show. The small amount of chromatic aberration visible in the 102GT was not and is not an issue for me. I still have and use this very capable 4" refractor and I have no plans to replace it with a far more expensive 4" APO. . 

I'll have to do a side by side with mine and see if I come to the same conclusion as you? I don't use my 80ED that much anymore. Maybe I'll keep it for sweeping the Milky Way with a 4* FOV eyepiece?

 

Keep the C80ED for planet and lunar and double stars.  That is what it does best.

 

Mike



#23 Peter Besenbruch

Peter Besenbruch

    Fly Me to the Moon

  • *****
  • Posts: 7,129
  • Joined: 21 Aug 2014
  • Loc: Oahu

Posted 24 July 2017 - 03:18 PM

My C80ED gives sharper and more contrasty images of planets, the Moon and double stars.  The improvement is not subtle.

 

Yes, but the C80ED is one of those ultra-high-end, ED thingies.

 

I'm curious, though. Were you able to set both of them up, and do a side by side comparison? I used to own a 4" Vixen/Celestron scope, and yes, Jupiter was a good way to expose the scope's weaknesses.

 

One last thing: I finally broke down and bought a GSO focuser and adapter for the C80ED. It's marked as "out for delivery."


  • joseph07081, Sarkikos and REC like this

#24 tony_spina

tony_spina

    Mercury-Atlas

  • *****
  • Posts: 2,716
  • Joined: 14 Jun 2004
  • Loc: So. Cal.

Posted 24 July 2017 - 04:28 PM

 

I purchased my 102GT refractor on a whim ($59). After using it a couple of times, I sold my ED80 APO scope! The views through the 102GT ... planetary and deep-sky ... were superior to what the ED80 would show. The small amount of chromatic aberration visible in the 102GT was not and is not an issue for me. I still have and use this very capable 4" refractor and I have no plans to replace it with a far more expensive 4" APO. . 

To each their own, and there's no use arguing from personal experience.  But I don't get why anyone would prefer a C102GT achro to a C80ED ... or sell the C80ED and keep the C102GT. 

To my eyes the C80ED clearly has a sharper image and better perceived contrast for planets and the Moon.  The kicker for me is Jupiter.  I just need to compare the image of Jupiter through the C102GT (or my old C4-R) to that seen through the C80ED.  No contest. 

The C80ED is also excellent for double stars.  Great color, great resolution.  I don't see the C102GT doing better.

Will the 12mm additional aperture allow the C102GT to go deeper for deep sky than the C80ED?  I suppose, but not by much, especially when you consider the smearing of the image due to CA. 

Then you have the easier grab-n-go capability and superior ergonomics of the C80ED versus the C102GT.  Well, to each their own.  shrug.gif

Mike

 

Don't you mean 22mm difference?



#25 epee

epee

    Soyuz

  • *****
  • Posts: 3,741
  • Joined: 30 Nov 2006
  • Loc: Suh-van-nuh, Jaw-juh

Posted 24 July 2017 - 05:00 PM

I read somewhere that the 102GT only has 97mm of clear aperture.


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics