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Celestron CGEM 925 EdgeHD Telescope

List Price:  £4,799.00
Price:  £3,990.00 (Inc. 20% VAT)Saving Of:  £809.00Earn 3,990 Loyalty Points

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Generally In Stock, Please Confirm Before Ordering  

Generally In Stock, Please Confirm Before Ordering

Model:  11081
Brand:  Celestron
Design:  SCT
Size:  9.25" (235mm)
Computerized:  Computerized GOTO
Level:  Advanced
Mount Type:  Equatorial

Celestron CGEM 925 EdgeHD Telescope
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Features the new EdgeHD optical design & high quality mount

The CGEM 925 HD combines Celestron's newly designed CGEM Computerized Equatorial mount with its new EdgeHD optical system. With over 9 inches of aperture and our premium StarBright XLT coatings, the CGE Pro 925 HD gives you over 1000 times the light gathering power than the unaided eye. Designed to give difraction limited performace, the CGEM 925 HD has established itself as a premier astro-imaging telescope.

New Optical Design

The EdgeHD optical system combines all the compact power popularized by the SCT and combines it with an improved high definition optical system for wide field, astrograph quality images. As a visual instrument EdgeHD optics delivers pin point images even with your widest field eyepiece. You can search for all of the Messier Catalog objects, and see hundreds of other equally interesting NGC, IC and Caldwell objects with amazing clarity. For astroimaging, the EdgeHD optics produces aberration-free images across your favorite CCD or DSLR camera. All EdgeHD optics are designed to produce an extremely flat focal plane precise enough to match the strict tolerances of the largest commercial ccd detectors, allowing all stars to be in tight focus to the very edge of the chip.

Diffraction Limited

Some companies boast that their telescopes give diffraction limited stars in the very center of the field of view . EdgeHD optics not only produce diffration limited stars on axis, but maintains diffration limited stars across the entire field of view of many of the most popular astrophotography cameras. Even at the very edge of a full frame camera chip, the EdgeHD 9.25 delivers diffraction limited stars s of only 1 arc seconds.

The EdgeHD 9.25 optics produces a focal plane almost 9 times flatter than the standard equivalent SCT telescope with diffraction limited stars across the entire Nikon D3 or Canon 5D field of view!

CGEM 925 HD - General Features:

9.25" EdgeHD Optics
CGEM Computerized Equatorial Mount
Celestron's premium StarBright XLT coatings
9x50 finderscope to help accurately find objects
Ultra sturdy 2" steel tripod with Accessory Tray
Star diagonal provides more comfortable viewing position when observing objects that are high in the sky

CGEM 925 HD - HD Features:

New aplanatic Schmidt telescope design produces aberration-free images across a wide field of view
Mirror tension locks hold the primary mirro in place and reduces image shift
Cooling vents allow hot air to be released from behind the primary mirror
Fastar compatible for fast f/2 imaging

CGEM 925 HD - Computerized Mount Features:

Proven NexStar computer control technology 40,000 object database with over 100 user-definable objects and expanded information on over 200 objects
New "All-star" Polar alignment uses any bright star for a quick and accurate Polar alignment
Software Features include: Mount Calibration, Database Filter Limits, Hibernate, five Alignment Procedures
Flash upgradeable hand control software and motor control units for downloading product updates over the Internet
Custom database lists of all the most famous deep-sky objects by name and catalog number: the most beautiful double, triple and quadruple stars; variable star; solar systems; objects and asterisms
Permanent programmable periodic error correction (PEC) - corrects for periodic tracking errors inherent to all worm drives
Drive Motors - Low Cog DC Servo motor with integrated optical encoders offer smooth, quiet operation and long life. The motor armatures are skewed to minimize cogging which is required for low speed tracking.
Internal Cable wiring for trouble-free setup and transportation
Designated six-pin RJ-12 modular jack, ST-4 compatible guide port
Autoguide port and auxiliary ports located on the electronic plate for long exposure astrophotography
Double-line, 16-character Liquid Crystal Display Hand Control with backlit LED buttons for easy operation of goto features
RS-232 communication port on hand to control the telescope via a personal computer
Includes NexRemote telescope control software, for advanced control of your telescope via computer
Secure power plug ensures that the Mount's power source is not accidentally disconnected
GPS compatible with optional CN16 GPS Accessory
Precision machined 40mm diameter steel Polar shafts supported by multiple tapered roller bearings and ball bearings.


Optical Design : EdgeHD Optics
Focal Length : 2350 mm (92.52 in)
Aperture : 235 mm (9.25 in)
Focal Ratio : 10
Finderscope : 9x50
Mount : CGEM Computerized Equatorial
Optical Coatings : Starbright XLT Coatings
Optical Tube : Aluminum
Eyepiece 1 : 23 mm (0.91 in)
Magnification 1 : 102 x
Star Diagonal : 2"
Tripod : Adjustable, Stainless Steel
CD ROM : NexRemote control software with RS232 cable
Power Supply : Car battery adapter
Highest Useful Magnification : 555 x
Lowest Useful Magnification : 34 x
Limiting Stellar Magnitude : 14.4
Resolution (Rayleigh) : 0.59 arcsec
Resolution (Dawes) : 0.49 arcsec
Eyepiece 1 Field of View : 0.53
Light Gathering Power : 1127 x
Angular Field of View : 0.8
Secondary Mirror Obstruction : 3.35 in (85.09 mm)
Secondary Mirror Obstruction by Area : 13.1 %
Secondary Mirror Obstruction by Diameter : 36.2 %
Gear : Steel worm gear and 90mm pitch diameter brass worm wheel
Motor Drive : Low cog DC Servo motors with encoders, both axes
Computer Hand Control : Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons
Slew Speeds : Nine slew speeds: 5 /sec, 2 /sec, 1 /sec, 64x, 16x, 8x, 4x, 1x, .5x
Tracking Rates : Sidereal, Solar and Lunar
Tracking Modes : EQ North and EQ South
Alignment Procedures : 2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar System Align
Software Precision : 24bit, 0.08 calculation
Database : 40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects
Power Requirements : 12 VDC 1.5 Amp
GPS : Optional CN16
Accessory Counterweights : 1 x 11 lb, 1 x 17 lb
Optical Tube Length : 22 in (558.8 mm)
Telescope Weight : 113 lb (51.26 kg)

Please note that stock levels do fluctuate so please call or email to check today's stock before placing your order.

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Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or

The delivery times for most items is 1 - 2 days but again, please double check stock levels on important orders before placing an order via the website.

The delivery costs for courier next day are for mainland UK only. If you live in the Scottish Highlands/Islands, Channel Islands or Northern Ireland, then a shipping surchage will apply. please contact us for prices. Smaller items can still go 1st class via Royal Mail.

Please note that if you are wanting to take advantage of our Saturday and Sunday timed services or next day pre 12 or pre 10:30 services, you MUST check that the stock is here at the shop before placing orders. Also, orders using the Saturday and Sunday services must be placed before 2pm the previous working day. Also, please remember to check that the stock is here at the shop before placing orders. If the stock is not at the shop, we won't be able to ship on any of the timed services. 

Please note International customers will need to contact us for a shipping price prior to ordering via the website. This all depends on the size and weight of the items. Please get in touch with us for any postage costs. Please note we do NOT ship telescopes or heavy items outside of the UK. This is due to massive postage costs and problems regarding returns.

If you have any questions regarding stock levels or delivery, please get in touch.

Rother Valley Optics now have a loyalty point scheme active on the website. As you can see from the products, every item has a point value. Each pound you spend with us, you will receive 1 loyalty point. 1 point is worth 1p. You can accumulate these points as you shop with us, then when you are over £5, you can spend them on the website! Easy as that.

Even if you collect most of your items from our shop, you can still order via the website and select the "shop collection" delivery option. Then you can come to our shop, collect your item and still get your points!

Please note this scheme is online only. Customers who order via the telephone can still be added to the scheme manually. Please ask for more details on this. Before placing orders online, please make sure you are registered with us first otherwise your points won't be allocated.

So happy shopping and if you have any questions about the scheme or any other queries, please get in touch.

Rother Valley Optics


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Please get in touch with us today to find out if you're applicable.

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Rother Valley Optics Ltd is registered in England and Wales 04762707. Registered Office: 21 Station Road, Kiveton Park, Rotherham, S26 6QP. Rother Valley Optics Ltd acts as a credit broker only. Rother Valley Optics Ltd are authorised and regulated by the Financial Conducts Authority. Credit provided subject to age and status..

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- - - Rother Valley Optics Ltd

01909 774 369