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Celestron Advanced Series C11-SGT Schmidt-Cassegrain Telescope

Item # HN-CELE112

Dimensions & Specifications

Aperture
280mm
Brand
Celestron
Component
.5 Arc Seconds Resolution, .42 Arc Seconds Resolving Power, 14.7 Limiting Magnitude
Eyepiece 1
40mm (70x)
Features
GoTo, Equatorial Mount
Finderscope
9x50
Focal Length
2800mm
Focal Ratio
f/10
GPS
No
GoTo
Yes
Good for Astrophotography
Yes
Highest Useful Magnification
660x
Lens Coating
StarBright XLT
Mount Design
CG-5 Equatorial
Object Database
40000 objects
Optical Design
Schmidt-Cassegrain
Recommended Usage
Viewing the Planets, Viewing Galaxies/Star Clusters, Viewing Nebulae, Astrophotography, Viewing the Moon
Star Diagonal
1.25 inch
Telescopes Series
Celestron Advanced Series Telescopes
Warranty
2-Year Limited
Weight Complete
91 lbs.

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Manufacturer Warranty

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  • 1.25-inch 40mm Plossl eyepiece
  • 9x50 finderscope and mounting bracket
  • State-of-the-art XLT coating
  • CG-5 German equatorial mount
  • Unparalleled quality for viewing more than 40,000 objects
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Customer Reviews

REVIEW SNAPSHOT®

by PowerReviews
Celestron Advanced Series C11-SGT Schmidt-Cassegrain Telescope
 
4.6

(based on 13 reviews)

Ratings Distribution

  • 5 Stars

     

    (8)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Strong construction (8)
  • Quality lenses (6)
  • Accurate (4)
  • Compact (3)

Cons

  • Heavy (3)

Best Uses

  • Astronomy (8)
    • Reviewer Profile:
    • Casual/ recreational (3)
    • Was this a gift?:
    • No (3)

Reviewed by 13 customers

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Displaying reviews 1-5

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(0 of 3 customers found this review helpful)

 
5.0

How to assemble your C-11"CG-5GTAdvanced

By Jules Vieira.

from Oakville, Ontario, CANADA:

About Me Professional Guide

Pros

  • Accurate
  • Compact
  • Easy to Use
  • Quality Lenses
  • Strong Construction
  • The C-11 SGT CG-5Advanced

Cons

  • Heavy

Best Uses

  • Astronomy

Comments about Celestron Advanced Series C11-SGT Schmidt-Cassegrain Telescope:

Nobody, no-one in the Advanced Amateur Astronomy Clubs and Astro-Photographers are expecting one who owns this Instrument to Fully Assemble the C-11" Schmidt Cassegrain and its CG-5 GT Advanced Mount in just 1 Phase, which would be a Hefty Heavy 105.4lb. to lift, far to excessive. The C-11" SGT CG-5 Advanced is made to be Assembled in 3 Phases of 35.4lb. average, Mount is 42lb. and Optical Tube is 28 1/2 lb. Phase 1)Assemble the CG-5 GT Mount according to Manual Instructions leaving only the Counter-Weight Single 11.8lb. Weight only placed on After you have brought only the CG-5 GT Advanced Mount Only (No Counter-Weights yet.) to your Suburban or Rural Sight Location 1st then Phase 2)Put on 1 Counter-Weight of 11.8lb. onto the Threaded Counter-Weight Shaft, to produce some stability when you slide the Dovetail of the Optical Tube Assembly, and Tighten Extremely Tight the 2 Dovetail Winged Nut Bolt and Smaller Angled Screw Extremely Tight to Hold into the Dovetail of the C-11" Optical Tube so that in cannot slide off the Dovetail a break your Super-Expensive Optical Tube Assembly, so Tighten very Tight the DoveTail Nut and Screw to make sure your C-11 is Rigidly Tightened onto the CG-5 GT Mount. Also Tighten very Tight the 2 Winged Nut Rod Bolts which are located above the Accessory Tray for Maximum CG-5 GT Advanced ATLAS Rigidity of its 2.00 inch legged ATLAS Mount. Phase 3 done at your Backyard Location or Rural Country Skies Location 3) Insert the last 2 Counter-Weights of 11.8lb. each onto the Shaft of the Mount. You now have 35.4lb. of Balancing Counter-Weights,Balance your Telescope in accordance to the Manuals. The Total Weight of the Complete Telescope and Mount on your Backyard Suburban 5th Magnitude Stellar Nights or 6th Magnitude Rural Country Skies is now 105.4lb. Total with Extra Photographic Payloads as extra Counter-Weight Balance Adjustments. When you bring the Telescope back Indoors, just do the REVERSE of the above 3 Phase Assembly operation, this time, Disassembly operation. Both Assembly and Disassembly operations take between 21 to 30 Minutes to complete depending on the dexterity, smoothness and correct concentration of the Assembler/Disassmbler!!!!

  • Was this a gift?:
  • No
 
5.0

Superb Instrument for Astro-Photograpy:

By Jules.

from Oakville, Ontario,CANADA.

About Me Professional Guide

Pros

  • Accurate
  • Compact
  • Easy to Use
  • Quality Lenses
  • Strong Construction
  • Testing the C-11 SGT CG-5

Cons

  • Heavy
  • Need further Testing

Best Uses

  • Astronomy
  • Low Visibility

Comments about Celestron Advanced Series C11-SGT Schmidt-Cassegrain Telescope:

I bought the Celestron C-11 SGT CG-5 GT-Advanced in the Summer, July 6th of 2011. The instrument tooks 3 Phases of about 20 minutes to assemble. 1st Phase) Was the Assembly of the Mount, Tripod extended half-way, Head Assembly was positioned according to the manual,with very solid tightening of the Head onto the base Tripod by Tightening very hard the 2 Winged-Large Nuts at the under base of the Accessory Tray and especially the Winged-Nut below the Tripod just above the Accessory Tray. This gave the Tripod Extreme ATLAS Rigidity. Then I took the Tripod Assembly to my Backyard Patio, where on July 15th is was a Warm-Dry Transperant Milky-Way Galaxy Views, All the Constalletions where seen due to my 5th Magnitude Deep Suburban location in CANADA. I then Threaded the Counter-Weight Shaft with upper Aluminum Sleeve. I Threaded 1 11.8lb Counter-Weight which was my Phase 2 of the Assembly. I then grabbed the C-11 StarBright XLT Tube Assembly from left hand on the Optical Tubes rear Handle and the right Hand just under the Tube Assembly. The Tube Assembly was already Aligned with the 9x50mm. FinderScope which I Aligned during the Daytime using a distant Roof-T.V. Antena. In phase 3) I slide on the Optical Tube Assembly Dovetail onto the Main Dovetail receing plate sliding the Optical Tube Assembly to 1/3 from the rear End of the Optical Tube Assembly, I quickly then added the extra 2 Counter-Weights of 11.8lb. each to reach 35.4lb. 3 Counter-Weights to Balance the Optical Tube Assembly. I did this at 8:45 P.M. and assembley in 21 minutes at 9:06 P.M. the Entire Assembly. Phase 3 Completed . I attached the Keypad NexStar Controller and a 300 Ampere 12 Volt Charger Battery with Cigerette Lighter to the Mount for Power. I was now ready for my 1st use of the Telescope. Although Heavy at 70 lbs. 42lbs. Mount and 28 lb. C-11" OTA, the 3 Counter-Weights brought the Total Weight to 105.4 lbs. but it was an easy Setup in 3 Phases as mentioned above, and the 3 Phases of assembly 21 Minutes. So, you are actualy only assembling/dis-assembling 35.13lb. each time. Testing the Computer Keypad after turning on the KeyPad NexStar was a easy breeze task. Also , with the Rigidity of the CG-5 GT5 Advanced Mount Fully Tightened on its 2 Base Winged-Nuts made a very Strong-ATLAS 2" Stainless Steel Platform for Astro-Photography.Better than the ORION Proview Sirius and Atlas mounts. This GC-5 GT Advanced Mount with its heavier legs was a Super-ATLAS Mount FULLY-Computerized.I tried the left/right, up/down Slewing at Full 4degrees/second because I use a 300 Ampere Charger as a Power Source, The Telescope was smooth and rigid, the mounts Motors where quite enouph on my CG-5 GT Advanced SGT very close to the sound of the CGEM more Expensive mount, I was delighted. The Instrument passed all constant tests of Slewing and Pointing. But I, did not have enouph time to test ALL the Point and Slewing and Database tests because I was getting a lot of Clouds by 3:00 A.M. and Cloudy Weather on other days. It is now, in this Summer late July, August, September,October Summer Season that I will test the Accuracy of the Electronics for Polar Alignment and Accurate Pointing and Tracking of Celestial N.G.C. , Messier and IC Objects which is Phase-Test 2 of 2012 Summer, but from Phase 1 Preliminary Testing, the CG-5 GT Advanced is Much more Solid than my Celestron 130mm. SLT Alti-Azimuth Fully Computerized mount. If you tighten-very-tight the 2 Base Winged Nuts on the base of the CG-5 GT Advanced Mount you get a Super-Stable-ATLAS
performing Mount. I touched many times the C-11 Tube looking for Dampening Still Charactoristics, and the CG-5 GT Advanced Mount took less the 1/2 Second to regain NO Vibrations, This is a Testament to Superb Characteristics of the CG-5 GT Advanced Mounts Superiority CGEM Cabable Rigidity when you Tighten the Base Winged Nuts at the Base of the CG-5 Mount very tight. This Instrument is extremely "COMPLEX" and I have NOT fully tested the Polar-Scope yet, for Accurate All-Star Polar Alignment as described on Pages 30-32 of the Manual. Later in August of 2012, I will have a better Assessment of this very "Complex Instrument C-11" StarBright XLT Optical Tube which has "Text Book Velvet Enamel White Airy Dics and shows FULL Diffraction Limited Performanc++,Evenly Circular Eluminated Discs to the Edge of the Field.If you want Aplanatic EdgeHD Performance out of your Standard CELESTRON Schmidt-Cassegrain just Thread on the F/6.3 Field Corrector/Flattner Telecompressor whethe Celestron or Meade and you will get "Aplanatic-ACF(Anti Coma FREE.) out of your Standard-Schmidt Cassegrains because the F/6.3 Reducer/Flattner Corrector Corrects both residual Field Curvature and Elimates ALL Remainder Coma as your Critical Extra-Focal Edge Residual Coma into Perfectly "Circular Airy Discs right to the Edge of your Field of View, meaning you Do NOT need a EdgeHD or ACF either Celestron or Meade if you Thread into the Visual Back either the Celestron or Meade Telecompressor F/6.3 Reducer/Field Flattner Lens. To bring your F/10 Standard Schmidt Cassegrains back to F/10 than just use Extension Rings threaded to the back of the F/6.3 Reducer/Field Flattner Telecompressor Multi-Coated 4 Element Reducer/Corrector lens which "Removes ALL Residual Coma". This gives you an Aplanatic EdgeHD or ACF Schmidt-Cassegrain on standard Schmidt-Cassegrains by the Addition of the F/6.3 Reducer/Field Flattner Telecompressor. Also, because this instrument is "Complex" in its Capabilities , I will need the Entire Summer of 2012 to Fully Assess the Pointing Accuracy and Tracking Accuracies of this Superb-Instrument and Super-Heavy Duty 2.00 inch Stainless Steel legged Atlas Mount. But, as of this writing as an owner of a 130mm. SLT Computerized NexStar Telescope. It looks like this Instrument is going to Perform "SUPERBLY" even on slight breezy Dark Deep Suburban Backyards and Rural Country Sights. It takes 21-25 Minutes to Assemble in 3 Stages as mentioned earlier, but the effort more than pays off. This Instrument is a Real Astro-Photographic ATLAS Mount, shows enormous promise and is equal on par with the CGEM Mount without the PEC (Periodic Error Correction.) which is only a conveniance and NOT needed with you can GuideStar out Any Guiding Errors or PHD Errors are Automatically Corrected for PEC problems. Manual Eye Illumintated Guidance is also Corrected for PEC errors so your PEC is NOT necessary for Astro-Photography. Check www.Celestron.com Image/Gallery using the CG-5 GT Advanced Computerized Mount and you will see that successfull Astro-Photography is the the FULL Range of the CG-5 GT Advanced Fully Computerized Mount. P.S.=If you insist that you still want PEC in your CG-5 GT Advanced Mount then you can "Download PEMPRO" from the Internet which gives your CG-5 GT Advanced Mount PEC for $149.99 into the DataBase of your CG-5 GT Advanced ATLAS Mount. Nevertheless, as of this writing I still need to test the Pointing & Tracking accuracies of this Atlas-Mount but comparing to my 130SLT Teleescope which Points and Tracks Perfectly for many Hours, it Appears this CG-5 GT Advanced Mount will do Better ALL Night Long with the Tracking Deep Sky Object in the Center of the Field without any Guidance for many Hours,Great Astro-Photographic Platform,Visual too.!!!!

  • Was this a gift?:
  • No
 
4.0

Great scope

By Terry

from central New York

About Me Casual/ Recreational

Verified Buyer

Pros

  • Quality Lenses
  • Strong Construction

Cons

  • Heavy

Best Uses

  • Astronomy

Comments about Celestron Advanced Series C11-SGT Schmidt-Cassegrain Telescope:

First, this scope takes about 15 to 25 minutes to set up, but that is no problem because you know ahead of time when you are going out to view, so you have lots of time. I have had trouble with the computer, but that is more my fault for not knowing enough names of stars to align it, and then finding them in the finder scope. Once you get it set up, it is just great for viewing. Even with my bad back, its not a big deal to set up.

  • Was this a gift?:
  • No

(2 of 2 customers found this review helpful)

 
5.0

Great value for amateur

By Sherman

from Oxnard, CA

About Me Casual/ Recreational

Verified Buyer

Pros

  • Compact
  • Quality Lenses
  • Strong Construction

Cons

    Best Uses

    • Astronomy

    Comments about Celestron Advanced Series C11-SGT Schmidt-Cassegrain Telescope:

    I was looking for the largest lens that I can still carry by myself (estimating no more than 40 pounds). The optical tube at 31 pounds felt a lot lighter probably because of good handle design. Very solid construction, from tripod to mount to tube. Excellent finder scope at 9x50mm. Manual could describe a bit more on polar alignment. Overall great scope at great price!

    (2 of 5 customers found this review helpful)

     
    4.0

    Excellent Telescope Poor Marketing

    By Earl

    from Cleveland OH

    About Me Avid Adventurer

    Verified Buyer

    Pros

    • Accurate
    • Strong Construction
    • Well engineered

    Cons

    • NO AC ADAPTER
    • No Red Dot finderscope

    Best Uses

    • Astronomy

    Comments about Celestron Advanced Series C11-SGT Schmidt-Cassegrain Telescope:

    This is actually an incredible Telescope. It is rather heavy but it is reasonable to setup. You really need to devote several hours to observing if you are going to spend 30 minutes to setup and align. Once you get it aligned it really is amazing to use. I can honestly say that I am really impressed and would highly recommended. That being said now let me vent. How can the folks a Celestron not think that adding an AC ADAPTER be a good idea. Really did they think that the moment the boxes arrived we would jump in our cars and head to some remote site and use the CAR ADAPTER SERIOUSLY!!!!!!!!!!! NO Celestron we set it up in our backyards first to figure it out. Secondly why would you not include a RED DOT finderscope. The really sad part is that Celestron makes a really nice RED DOT finderscope. Do the fine folks at Celestron realize how much easier it would be to align with a RED DOT. Thank you I feel better already. Yes I would recommend this telescope. It really is a pleasure to use and well worth the time to set it up.

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    Customer Q & A

    5 Questions About This Product
    Q: "Besides the mount and GPS, are there any other difference between the NexStar 11 GPS, and the advanced series C11 SGT? Are the optics the same?"
    A: Yes, the optics are exactly the same. And if you add the GPS accessory to the C11, you will have a scope that is very similar. The major advantage of the GPS version is that everything is integrated together. Obviously the major difference is the mount. The C11 offers the EQ mount and the GPS has the dual fork mount. Both mounts are VERY good.
    Q: "Does this model support the Fastar CCD camera assembly?"
    A: I am sorry but no the Fastar lens assembly that was made for the 11" Gps has been discontinued by Celestron, it is only available for the 8' GPS model now.
    Q: "Does this telescope have a built-in motor drive? Can I use a power tank to run this telescope?"
    A: Yes it has a built in motor drive and you are definitley able to use the Celestron Power tank for your power source.
    Q: "Can RA and Dec. coordinates be entered into the hand controller to locate objects not in the menus?"
    A: Yes that is one of the many ways to look for a specific celestial object.
    Q: "Might I need a collimator for this scope?"
    A: You'll not require a collimator for the Celestron C11-S GT telescope.
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