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Telescopes > Celestron > CGEM > Celestron Schmidt-Cassegrain telescope EdgeHD-SC 235/2350 CGEM 925 GoTo
Product no.: 25091

Schmidt-Cassegrain telescope EdgeHD-SC 235/2350 CGEM 925 GoTo

$ 5,700.00 incl. VAT, plus shipping costs
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Product description

The Celestron EdgeHD telescope: Corrected image - sharp right up to the edges!

EdgeHD is the name for Celestron’s “aplanatic Schmidt Cassegrain telescope”. After over 50 years of success, Celestron has revolutionised the classic Schmidt Cassegrain telescope.

EdgeHD telescopes ( "Edge High Definition") are true astrographs. This optical system delivers distortion-free, sharp images right to the edge of the visual field. This means that not only the coma outwith the optical axis is corrected, as is the case in currently available “coma-free” lens designs, but also field curvature.

Lots of optical systems are advertised as “astrographs”. As desired, they display stars with pin-sharp clarity, but along a curved image plane. Photographing this using a camera results in a noticeable image field curvature which rises towards the edge of the image field, resulting in increasing star size and aberations with larger sensors. The stars at the edge expand into small rings (“doughnuts”). As well as the coma, the Celestron Edge HD telescopes correct field curvature right up to the edge of the image. This also significantly improves resolution and magnitude limits in comparison to rival optical systems.

The XLT multi-coating helps to give the EdgeHD scopes a significant performance boost compared to similar systems on the market.

The Edge HD telescopes’ mechanisms and lens tube have been fully overhauled:

  • mirror clamps hold the primary mirror securely in any desired position without putting pressure on the optical elements. The image is stable, even during long exposure times.
  • Air vents behind the primary mirror provide fast air exchange so that the lens cools amazingly quickly. Thanks to an air filter system, dust is prevented from entering the lens tube.

Included in delivery with the telescope:

  • Celestron EdgeHD SC925 OTA with 235mm aperture and 2350mm focal length
  • 2" star diagonal
  • 2" to 1.25" eyepiece adapter
  • 2", 23mm Axiom LX eyepiece
  • 9x50 finder scope
  • dovetail mounting rail

The CGEM mount has a fresh, attractive, bold appearance and is capable of carrying Celestron's higher-end SCT optical tubes (up to 11") securely and vibration free, which is ideal for both imaging and visual observing. Capable of holding over 40 lbs of payload and slewing at 5 per second, you will be able to instantly point to any of the celestial objects in the database.

Ergonomic Design - CGEM was designed to be ergonomically friendly with large Altitude and Azimuth adjustment knobs for quick and easy polar alignment adjustment. The internal RA and DEC motor wiring provides a clean look and an easy and trouble free set up.

Innovation - The CGEM series has a new innovative Polar alignment procedure called All-Star. All-Star allows users to choose any bright star, while the software calculates and assists with polar alignment. Another great feature of the CGEM sure to please astroimagers, is the Permanent Periodic Error Correction (PEC) which will allow users to train out the worm gears periodic errors, while the mount retains the PEC recordings.

Performance - For objects near the Meridian (imaginary line passing from North to South), the CGEM will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky. The CGEM mount has a robust database with over 40,000 objects, 100 user defined programmable objects and enhanced information on over 200 objects.

Celestron's CGEM mount is the perfect fit between the Advanced Series and CGE Series. Offering the portability of the Advanced Series and the precision of the CGE.

It not only matters which telescope you buy but also where you buy it. Our additional services:

  • We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
  • We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.
  • We also provide an edition of the exciting astronomy magazine, “Sterne und Weltraum” with each telescope.

Specifications

Optics


Type
Reflector
Type of build
EdgeHD-Cassegrain
Aperture (mm)
235
Focal length (mm)
2350
Aperture ratio (f/)
10
Resolving capacity
0,49
Light gathering capacity
1127
Max. useful magnification
470

Focuser


Connection ( to eyepiece)
2

Mount


GoTo control
yes
Mounting type
Equatorial
Type of build
CGEM
Tracking speed
5 - 2 - 1
Tracking speed
64 - 16 - 8 - 4 - 1 - 0,5
Power consumption (mA)
1500
Power supply
12
Load capacity (kg)
18

GoTo control


Alignment method
Auto, 2-Star, 1-Star, Fast, Last Alignment, Hibernate, Solar System
Database
40.000
GPS
optional
Hand Controller
NexStar
Tracking modes
parallactic - North-South
Tracking speeds
sideral, solar and lunar
Interfaces
AutoGuider, Aux, RS232
Software
NexStar
GoTo Language
german, english, french, spanish, italian, russian

Tripod


Type
Tripod
Material
Steel

Included accessories


2'' eyepieces
Axiom LX 23mm
Finder scope
9x50
Deviating optics
2", 90° star diagonal
Eyepiece adaptor
1,25" & 2"
Software
NexRemote

General


Series
CGEM
Special recommendation
yes

Area of application


Nature Observation
not recommended
Moon & Planets
yes
Nebulae & galaxies
yes
Astrophotography
yes
Sun
not recommended (Only with appropriate Sun filter)

Recommended for


Beginners
not recommended
Advanced
yes

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*All prices include VAT plus shipping costs.

Celestron Schmidt-Cassegrain telescope EdgeHD-SC 235/2350 CGEM 925 GoTo

Focuser and main mirror focusing

Celestron Schmidt-Cassegrain telescope EdgeHD-SC 235/2350 CGEM 925 GoTo

Front view with finder scope and fully HyperStar-compatible secondary mirror unit.

Celestron Schmidt-Cassegrain telescope EdgeHD-SC 235/2350 CGEM 925 GoTo

Controls for main mirror focusing and openings for main mirror ventilation

Celestron Schmidt-Cassegrain telescope EdgeHD-SC 235/2350 CGEM 925 GoTo

The finder scope and the focuser in detail

Celestron Schmidt-Cassegrain telescope EdgeHD-SC 235/2350 CGEM 925 GoTo

An Axiom LX eyepiece is included in delivery.

Celestron Schmidt-Cassegrain telescope EdgeHD-SC 235/2350 CGEM 925 GoTo

CGEM equatorial mount

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