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Description
Sky-Watcher Quantum top of the line ED-APO refractors offer premium optical performance for discriminating amateur astronomers and imagers. Refractors are coveted for their high-definition, superb for observing optimal detail planets and binary stars while delivering the contrast needed to see faint nebulosity against a coal-black sky background. Quantum refractors utilize the most modern optical glasses and fabrication techniques to deliver the ultimate in high-fidelity astronomical imaging. Each lens element is individually inspected for purity and absence of striations and other image-degrading imperfections. Every lens is pitch polished to exacting standards of optical fabrication and performance by highly skilled opticians and tested on an optical laser bench to rigidly controlled optical standards. The result is high-quality, diffraction-limited optics performing to the theoretical limits of their respective aperture sizes.
Includes full accessory assortment:
- 28 mm eyepiece w/ 2\" barrel diameter, fully multi-coated optics
- 2\" dielectric mirror star diagonal w/ 1.25\" adapter
- 9x50 correct-image right-angle finderscope with machined dovetail bracket
- Aluminum dust cover
- DSLR camera adapter (requires optional 48mm DSLR ring)
Features
- APO Quality - Quantum refractors are designed to assure virtual elimination of residual chromatic aberration (\"false color\") normally present in 2-element achromatic lens designs. Using extra-low dispersion (ED) glass, S-FPL51, for two of the lens elements and Schott glass for the other three lens elements, the Quantum 100ED 5-element design delivers crisp, high-fidelity views of planetary
- F/5 Focal Ratio - excellent for visual and wide field imaging use.
- Field Flattener - the Quantum 100 has a built-in two-element field flattening lens that provides sharps, in-focus stars across a large 43 mm image circle.
- Precision Linear Bearing Focuser - Optical focus is achieved by means of a mechanically ultra-smooth, backlash-free, precision linear bearing focuser with giant 3\" diameter drawtube. This rotatable focuser offers 2-speed fine and micro-fine focusing adjustments with an engraved scale. Includes 2\" eyepiece adapter.
- Carbon Fiber Optical Tube - Dent and scratch-resistant carbon fiber optical tube not only provides a stylish protective finish but also delivers excellent thermal stability and mechanical stiffness.
- EQ Mount Ready - All-metal tube rings and a CGE-style dovetail plate makes Quantum refractors ready to be mounted on any of Celestron\'s high quality imaging platforms, like the CGEM or CGEM Deluxe equatorial mounts.
- Retractable Carbon Fiber Lens Shade - For compact and safe storage.
- Aluminum Case - Offers protection for your instrument.
Specfications
- Optical Design: Refractor
- Field Flattener: Built-in
- Aperture (mm): 100 mm (3.94 in)
- Focal Length: 500 mm (20 in)
- Focal Ratio: 5
- Focal Length of Eyepiece 1 (mm): 28 mm (1.1 in)
- Magnification of Eyepiece 1: 18 x
- Finderscope: 9x50, erect-image, right-angle
- Star Diagonal: 2\", dielectric coatings
- Tube Ring: With 3\" (CGE Style) dovetail plate
- Highest Useful Magnification: 236 x
- Lowest Useful Magnification: 14 x
- Limiting Stellar Magnitude: 12.5
- Resolution (Rayleigh): 1.39 arc seconds
- Resolution (Dawes): 1.16 arc seconds
- Light Gathering Power (Compared to human eye): 204 x
- Optical Coatings: Fully multi-coated
- Optical Tube Length: 17 in (432 mm)
- Weight (lbs): 18 lbs (8.16 kg)
- Fully Illuminated Field: 43 mm (1.69 in)
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