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Telescopes > Celestron > CGEM II > Celestron Schmidt-Cassegrain telescope SC 279/2800 CGEM II 1100 GoTo
Product no.: 52279

Schmidt-Cassegrain telescope SC 279/2800 CGEM II 1100 GoTo

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Product description

More about the series CGEM II...

The Schmidt-Cassegrain optics by Celestron:

Despite the long focal length of these telescopes, the OTA itself has a very short length, making the system a compact telescope which is extremely easy to transport. Light first hits an aspherically figured Schmidt corrector plate and is then thrown onto a spherical main mirror. This reflects the light back up, throwing it onto a secondary mirror which subsequently throws it back in the direction of main mirror. The light then passes through a central hole in the main mirror and into the focuser at the bottom of the OTA. Thus the system is closed and hence does not suffer from air turbulence which could degrade the image. Of course this also means that the system is optimally protected from dust. The Schmidt plate is multi-coated, ensuring bright images which do not suffer from stray light reflections.

This telescope provides a very good image, boasting high contrast and definition and provides a lot of pleasure when planetary observing. The Schmidt-Cassegrain design provides a good all-round system suitable for both observing and astrophotography and with an enormous range of optional accessories available. Using the bottom end of the OTA to look through means easy orientation. The system is also optimal for occasional terrestrial observing, e.g. birdwatching at close range. Celestron SC telescopes have an aperture ratio of around 1:10 which, so astrophotography is also very easily possible.

Main mirror focusing means a very large range of focus is made available, which allows virtually any common accessory to be used. Two pre-loaded ball bearings are used in the main mirror focus positioning mechanism in order to prevent 'mirror shift' - a typical problem when using simple bushings. The use of high quality materials such as CNC-milled aluminium components, cast steel and stainless steel guarantees extreme robustness with low weight. This means that a very heavy mount is unnecessary, not always the case for other telescope designs.

Features of the optics:

  • long focal length with short OTA
  • low weight aluminium OTA
  • high quality XLT multi-coating
  • closed system
  • pre-loaded ball bearings for low mirror shift main mirror focusing

CGEM II mount

Celestron has updated its popular CGEM mount. Version 2 features a sturdier tripod, USB port, dual dovetail clamp for Losmandy and Vixen standards, improved ergonomics and firmware!

But it has not changed the tried and tested features of the CGEM, which continues to be a highly reputable mount for astrophotography - safely carrying Celestron SC OTAs of up to 11-inch (279mm) aperture for astrophotography purposes. Of course, you can also use the CGEM with telescopes from other brands, whether refractors or medium-sized Newtonian telescopes. The dual saddle clamp is suitable for the two common prism rail formats (also known as dovetail rails). The saddle clamp has two large, handy screws that can even be easily operated when wearing gloves. Since the clamp engages over its entire width with the prism rail and not just the screws themselves, no damage to the rail can occur during setting up.

Additional advantages of the CGEM II

  • the tripod legs are marked, allowing you to extend the legs to a consistent length and easily remember your preferred length.
  • built-in All-Star Polar Alignment by Celestron to align the mount using any star. So you do not need a polar finder and do not have to separately north align. You do not even need a clear view of the Pole Star! The screw for adjusting the polar height is large and convenient. This is an important advantage, as the polar height adjustment must be done with the weight of the OTA present.
  • large database of all popular deep sky objects, catalogued by name and catalogue number; the most famous double, triple and quadruple stars as well as variable stars and objects within the solar system.
  • Permanently Programmable Periodic Error Correction (PPEC)
  • double-line, 16-character LCD hand control with backlit buttons. The hand controller has a USB port for easy connection to the PC for firmware updates of the mount and hand controller.
  • tracking beyond the meridian by up to 30° - so that long-term exposure astrophotography does not have to be suddenly interrupted.

The CGEM II is between the AVX and CGX mounts in Celestron's range of modern equatorial GoTo mounts. For beginners, we recommend the low-priced AVX - which has all the advantages of NexStar + electronics, but is not mechanically designed to carry large OTAs. The CGX mount meets the highest demands of astrophotographers, even when carrying heavy equipment. Finally, the CGEM II is an excellent compromise between carrying capacity, performance and price. It is the workhorse of sophisticated astrophotographers.

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
Schmidt-Cassegrain
Aperture (mm)
279
Resolving capacity
0,41
Limit value (mag)
14
Light gathering capacity
1590
Max. useful magnification
558
Coating
Starbright XLT
Tube material
Aluminium
Tube length (mm)
610
Tube weight (kg)
12,5
Focal length (mm)
2800
Aperture ratio (f/)
10
Tube construction
Full tube

Reflector


Secondary mirror obstruction
34
Secondary mirror diameter (mm)
95
Ventilation for central mirror
no

Focuser


Gear reduction
without
Connection ( to eyepiece)
1,25"
Connecting thread (telescope side)
SC
Type of build
SC thread

Mount


Mounting type
Equatorial
GoTo control
yes
Polar elevation setting (°)
15 - 70
Motors
Servomotors
Encoder
yes
Weight (kg)
18
Load capacity (kg)
18
Power supply
12

GoTo control


GPS
optional
Software
NexStar
GoTo Language
German, English, French, Spanish, Italian
Alignment method
2-Star Align, Quick Align, 1-Star Align, Last Alignment, Solar System Align
Database
40.000
Interfaces
2x Aux, USB 2.0, Autoguider
Remote
Celestron PWI

Tripod


Tripod leg diameter (mm)
51
Type
Tripod
Material
Steel
Weight (kg)
9

Included accessories


Counterweights (kg)
2x7,7
Power pack
no
cigarette lighter socket
yes
Prism rail
Losmandy-Style
Finder scope
9x50
Polar finder scope <p>
no
Transport cases
no
1.25'' eyepieces
25mm
Deviating optics
1.25", 90° star diagonal

General


Series
CGEM II

Area of application


Astrophotography
yes
Moon & Planets
yes (very good)
Nature Observation
no
Nebulae & galaxies
yes
Sun
no (Only with appropriate Sun filter)

Recommended for


Beginners
no
Advanced
yes
Observatories
yes

Recommended accessories

Telescope accessories > Adaptors (3)

Baader 2'' ClickLock SC clamp

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Telescope accessories > Focusers (3)

PegasusAstro Focusing Motor FocusCube für Celestron SC 11

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Telescope accessories > Transport & storage (8)
Carry case

Oklop Carry case Padded bag for C11 telescopes

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Telescope accessories > Dew shields & Ventilation (4)
Soft dew shield cap

Celestron Soft dew shield cap C11

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Telescope accessories > Cables & power supplies (8)

Celestron Aux Port Splitter

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Finder

Omegon Radiant Finder with fastener

$ 49.90*
Eyepieces (3)
Eyepiece

Omegon Ultra Wide Angle eyepiece 9mm 1,25"

$ 69.00*
Eyepieces > Other (2)
Reticle eyepieces

Omegon Reticle eyepieces Illuminated crosshair eyepiece, 12.5mm

$ 89.00*
Filters > Moon filters & Polarizing filters (3)
Filters

Baader Filters 2" neodymium Moon and Skyglow filter

$ 158.00*
Filters > Nebulae filters (5)
Filters

Omegon Filters Nebula/ city light filter 1.25 ''

$ 39.90*
Filters > Other (1)
Filters

Omegon Filters Color filter set 1,25'' (6 pieces)

$ 69.00*
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Camera

ZWO Camera ASI 178 MC Color

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Omegon Easypic Universal Smartphone Adapter

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Celestron Reducer 0.63x / Corrector

$ 172.00*
Mountings & accessories > Controls (4)

Celestron WLAN-Modul SkyPortal Wi-Fi

$ 172.00*
Mountings & accessories > Other (3)
Pole finder

Celestron Pole finder Polsucherfernrohr for AS and AS-GT mounts

$ 75.00*
Observatories (1)

Omegon Tent observatory

$ 189.00*
Media (2)
Star chart

Omegon Star chart Planisphere

$ 14.90*
Outdoor (2)
Headlamp

Omegon LED headlamp

$ 13.90*
Astronomy (1)
Power pack

Baader 60W / 12.8V / 5A outdoor power cable

$ 74.00*
Globes & Maps (1)
Continental map

Oculum Verlag Sky Quality Map Europe

$ 18.90*
Solar Observation (1)
Solar Filters

Baader AstroSolar telescope solar filter ASTF 280mm

$ 194.00*
Maintenance & Cleaning > Lens cleaners (4)

Celestron Professional lenses cleaning set

$ 25.90*
Maintenance & Cleaning > Other (2)

Omegon microfibre cleaning cloth 20cm x 20cm

$ 4.90*

*All prices include VAT plus shipping costs.

Celestron Schmidt-Cassegrain telescope SC 279/2800 CGEM II 1100 GoTo
Celestron Schmidt-Cassegrain telescope SC 279/2800 CGEM II 1100 GoTo
Celestron Schmidt-Cassegrain telescope SC 279/2800 CGEM II 1100 GoTo
Celestron Schmidt-Cassegrain telescope SC 279/2800 CGEM II 1100 GoTo
Celestron Schmidt-Cassegrain telescope SC 279/2800 CGEM II 1100 GoTo

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