PRODUCT HIGHLIGHTS
 
100mm Apochromatic Refractor
900mm Focal Length, f/9 Focal Ratio
Proprietary MHC Multicoated Optics
Schott BK-7 and FPL-53 ED Glass
2" Crayford Focuser with 1.25" Adapter
20mm and 5mm Eyepieces, 90° Diagonal
8x50 RA Erect-Image Finderscope
Vixen-Style Dovetail Plate & Cradle-Ring
Foam-Lined Aluminum Carrying Case
The ProED 100mm f/9 Doublet APO Refractor from Sky-Watcher features a doublet apochromatic lens system with Extra-low Dispersion (ED) glass and Sky-Watcher's proprietary photon anti-rejection Metallic High-Transmission Coatings (MHC) on all air-to-glass optical surfaces. This combination of glass, lenses, and coatings virtually eliminates chromatic aberrations for clear and bright high-contrast images with true color rendition. This is a versatile optical tube assembly (OTA) that is well suited for wide-field astronomical observation of prominent nebulae, star clusters and galaxies, or can be used as an astrograph for sky photography, a terrestrial spotting scope or telephoto lens. The aperture of this 100mm model of the ProED not only increases image brightness over the smaller 80mm version, it improves resolution and contrast.A mounting cradle-ring clamps over OTA and allows the user to adjust the orientation and position of the scope relative to the mount to optimize viewing comfort and balance, while avoiding interference with other equipment. The scope is offered without a mount or tripod, but a Vixen-style dovetail plate makes it compatible with any alt-az or equatorial mount with a Vixen-style saddle.Its two-speed Crayford-style focuser helps make fine-focusing fast and precise without backlash. The ProED comes with several accessories to help you get observing faster and easier. First, are two long eye relief eyepieces that produce 30 and 120x magnification, a 90° star diagonal for more comfortable viewing, and a large 8x50 erect-image finderscope to make finding your celestial objects faster and easier. Finally, Sky-Watcher provides a foam-lined aluminum carrying case to safely store and transport the OTA.Optical Performance 
 
100mm objective lens
900mm focal length
Focal ratio: f/9
Refractor-style optical design
Extra-low Dispersion (ED) glass
Apochromatic doublet lenses eliminate chromatic aberrations for true color rendition and enhanced contrast
Proprietary anti-reflection Metallic High-Transmission Coatings (MHC) multicoatings on all optics
Bbjective lens cell is light-baffled to reject stray, unfocused light
Baffled draw tube for enhanced contrast
OTA interior is flat blackened to help prevent unfocused internal light reflections from reaching the focal plane
Resolution, Rayleigh: 1.39 arc sec
Resolution, Dawes: 1.16 arc sec
Focuser 
 
2" diameter focuser
Dual-speed Crayford-style
Crayford focusers use a toothless friction system that allows for super-fine precision focusing without backlash
Includes 1.25" adapter for using smaller eyepieces and accessories
Included Accessories 
 
Two 1.25" barrel diameter eyepieces:
5mm eyepiece: Yields 180x magnification
20mm eyepiece: Yields 45x magnification
Diagonal:
90° angle
Dielectric coatings for greater than 99% reflectivity
Star diagonal corrects images vertically, but not horizontally
8x50 erect-image finderscope with bracket
Foam-lined hard aluminum carrying case
Mount 
 
User-supplied mount and tripod required
Vixen-style dovetail plate included
Compatible with any alt-az or equatorial mount with a Vixen-style saddle
Cradle-ring assembly for plate allows the scope orientation to be changed based on mount configuration
Integrated 1/4"-20 piggy-back camera mount for wide-field astrophotography
Quick-release system for fast setup and breakdown
Sky-Watcher Pro 100ED APO Specs
Optical DesignApochromatic RefractorAperture3.9" / 100 mmFocal Length900 mmFocal Ratiof/9Eyepiece Barrel Diameter2"
1.25" with included adapterDiagonal90° StarFinderscope8x50 erect-imageTripodNoneMount TypeVixen-style dovetailLength36.2" / 92.0 cmWeight10.0 lb / 4.5 kg