Celestron EdgeHD CG-5 8" f/10 Aplanatic Schmidt-Cassegrain Telescope (OTA Only)

Celestron EdgeHD CG-5 8" f/10 Aplanatic Schmidt-Cassegrain Telescope (OTA Only)

Celestron EdgeHD CG-5 8" f/10 Aplanatic Schmidt-Cassegrain Telescope (OTA Only)

B&H # CEEH8OT MFR # 91031-XLT
Special Order
Expected availability: 7-14 business days

Product Highlights

  • 8" (203mm) Schmidt-Cassegrain OTA
  • 2032mm Focal Length, f/10 Focal Ratio
  • StarBright XLT Optical Coating System
  • EdgeHD Aplanatic Field-Flattener Design
  • Diffraction-Limiting SCHOTT Glass
  • 40mm Eyepiece and 90° Star Diagonal
  • Internal Focusing with Mirror Locks
  • 9x50 Finderscope with Mounting Bracket
  • Standard CG-5 (Vixen) Dovetail Plate
  • OTA Only; Mount and Tripod Required
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Mount Options: OTA Only

Advanced VX GoTo EQ Mount and Tripod

Not available with current selections

CGEM II EQ Mount and Tripod

Not available with current selections

CGX GoTo EQ Mount and Tripod wdvwqfxrtwfcaddyxtrdftva

Not available with current selections

CGX-L GoTo EQ Mount and 2.75" Tripod

Not available with current selections

OTA Only

Aperture: 8" f/10 (CG-5)

11" f/10

Special Order

14" f/11

Special Order

8" f/10 wdvwqfxrtwfcaddyxtrdftva

Special Order

8" f/10 (CG-5) 9.25 f/10

Not available with current selections

9.25" f/10

Special Order

This item is noncancelable and nonreturnable.

$0.00 Tax Collected Outside NY and NJ

Price:  $1,349.00

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  • 1Description

Engineered to deliver sharp and clear distortion-free views, the Celestron EdgeHD CG-5 8" f/10 Aplanatic Schmidt-Cassegrain Telescope is an ideal choice for observation, astrophotography, and imaging objects within or beyond our solar system. It features an aplanatic Schmidt-Cassegrain optical system consisting of a corrector plate, a spherical primary mirror, and a secondary mirror along with a set of field-flattening lenses integrated into the baffle tube. Complementing the EdgeHD system is the proprietary StarBright XLT optical coating system, which improves light transmission and reflectivity across the entire visual spectrum. The combination of EdgeHD and StarBright XLT produces bright and clear high-resolution images with true color rendition across the entire field of view without distortion, aberrations, or off-axis comas.

Optimized for imaging, the internal focusing system features mirror support clutches to ensure proper alignment and mirror locks to avoid accidental defocusing during long-exposure astrophotography. The optical tube is outfitted with a standard 1.25" visual back to make it easier to find eyepiece, accessories, and imaging gear. For visual observations, a 1.25" star diagonal is included along with a 40mm Plössl eyepiece that yields 51x magnification. The EdgeHD 8" is offered here without a mount or tripod for users who already have a reliable support system and are looking to upgrade or add to their existing gear, but comes with a standard-sized CG-5 dovetail plate that is compatible with Vixen-style saddles.

Optical Tube
  • 8" (203.2mm) aperture
  • f/10 focal ratio
  • 2032mm effective focal length
  • Aplanatic Schmidt-Cassegrain optical design
  • EdgeHD field-flattener aplanatic design eliminates spherical aberration, field curvature, and off-axis star coma to improve resolution, sharpness, and clarity across the entire field of view - especially at the edges
  • Diffraction-limited SCHOTT glass reduces internal light loss to improve color, clarity, and sharpness
  • StarBright XLT optical coatings
  • Flexible tension clutches hold the primary mirror in place to reduce image shift without putting any force or pressure on the mirror assembly, keeping subjects centered
  • Internal mirror locks prevent accidental adjustment to focus - important during long-exposure astrophotography
  • Integrated 95-micron mesh filter allows hot air to be released from behind the primary mirror without dust getting in, to prevent mirror distortion due to uneven surface temperatures
  • Resolution: 0.69 arcsec (Rayleigh); 0.57 arcsec (Dawes)
  • Secondary mirror obstruction: 2.7" (69mm); 34% by diameter; 11% by area
StarBright XLT System
  • Maximizes light transmission through optical path
  • Improves color rendition, contrast, sharpness, resolution, and brightness
  • Broadband system provides flat wavelength transmission across the entire visual spectrum
  • Multi-layer mirror coatings with layers of aluminum, SiO2 (quartz), and TiO2 (titanium dioxide)
  • Multi-layer anti-reflective corrector plate coatings with layers of MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide). Hafnium has a wider band-pass than the commonly used titanium
  • High-transmission water white glass corrector plate limits light loss due to internal absorption
Mounting
  • OTA only; mount and tripod required for proper use
  • Standard CG-5 (Vixen-style) dovetail plate
Included Accessories
Visual Back:

  • Standard SCT threads
  • 1.25" eyepiece/accessory holder
  • Use for prime focus or projection astrophotography with optional adapters

Eyepiece:

  • Plössl lens configuration
  • 1.25" diameter barrel
  • Accepts most 1.25" eyepiece filters
  • 40mm focal length yields 51x power

Diagonal:

  • 90° angle puts head in comfortable viewing position
  • Threaded for direct connection to OTA without the need for the visual back
  • 1.25" eyepiece/accessory holder
  • Star diagonal corrects image horizontally, but not vertically

Finderscope:

  • Low 9x magnification preserves wide field of view to more easily find alignment or guide stars
  • Large 50mm aperture helps to see dimmer objects and stars for easier star-hopping navigation
UPC: 050234103190
In the Box
Celestron EdgeHD CG-5 8" f/10 Aplanatic Schmidt-Cassegrain Telescope (OTA Only)
  • 9x50 Finderscope
  • 1.25" 90° Star Diagonal
  • 1.25" 40mm Plössl Eyepiece
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description
    Optical Design Aplanatic Schmidt-Cassegrain
    Aperture 8.0" / 203.2mm
    Focal Length 2032 mm
    Focal Ratio f/10
    Eyepiece Barrel Diameter 1.25"
    Diagonal 90° star
    1.25" snout and eyepiece holder
    Finderscope 9 x 50
    Tripod None
    Mount Type CG-5 dovetail plate
    Compatible with Vixen-style saddles
    Power Source None
    Optical Tube Length 17.0" / 43.2 cm
    Weight 14.0 lb / 6.4 kg
    Packaging Info
    Package Weight 22.15 lb
    Box Dimensions (LxWxH) 25.0 x 15.0 x 14.0"
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