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Celestron EdgeHD 8'' Optical Tube Assembly (CGE Dovetail)

Celestron EdgeHD 8'' Optical Tube Assembly (CGE Dovetail)

Celestron
CE-91030-XLT
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HK$ 11500


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圖片僅作供參考,並不代表產品實物及所包括配件。
Pictures shown are for illustration purpose only and may not be an exact representation of the product and accessories included.
  • Description

Optical Tube Info:
Optical Design: EdgeHD
Aperture: 203.2mm (8")
Focal Length: 2032mm (80")
Focal Ratio: f/10
Focal Length of Eyepiece 1: 40mm (1.57")
Magnification of Eyepiece 1: 51x
Finderscope: 9x50
Star Diagonal: 1.25" Star Diagonal
Optical Tube: Aluminum
Highest Useful Magnification: 480x
Lowest Useful Magnification: 29x
Limiting Stellar Magnitude: 14
Resolution (Rayleigh): 0.69 arc seconds
Resolution (Dawes): 0.57 arc seconds
Light Gathering Power (Compared to human eye): 843x
Secondary Mirror Obstruction: 64mm (2.5")
Secondary Mirror Obstruction by Diameter: 31%
Secondary Mirror Obstruction by Area: 9.77%
Optical Coatings: StarBright XLT
Optical Tube Length: 432mm (17")
Optical Tube Diameter: 238mm (9.37")
Optical Tube Weight: 14 lbs (6.35 kg)
Dovetail: CGE Dovetail Bar
Solar Warning
  • Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.
  • Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.
  • Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.

  • Experience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces.

  • Aluminum optical tube with tube vents featuring an integrated 50-mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging.

  • Versatile design accommodates 3 focal ratios: native f/10, f/7 with the addition of a focal reducer, or ultra-fast f/2 imaging with a removable secondary mirror and third-party accessories.

  • Celestron’s premium StarBright XLT coatings provide maximum light transmission.
  • A 9x50 finderscope, 1.25” mirror diagonal for more comfortable viewing, and 40 mm Plössl 1.25” eyepiece are all included.

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