Sky-Watcher EvoStar 100mm f/9 Doublet APO Refracto

The EvoStar 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 contrastA 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 saddleIts two-speed Crayford-style focuser helps make fine-focusing fast and precise without backlash The EvoStar 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 degrees 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

Features: 900mm Focal Length, f/9 Focal Ratio, 100mm Apochromatic Refractor, Proprietary MHC Multi-Coated Optics, Schott BK7 and FPL-53 ED Glass, Foam-Lined Aluminum Carrying Case, 20mm and 5mm Eyepieces, 90° Diagonal, 8x50 RA Erect-Image Finderscope, Vixen-Style Dovetail Plate & Cradle-Ring, 2-inch Crayford Focuser with 1.25-inch Adapter

Optical Design: Apochromatic Refractor

Aperture: 3.9-inch / 100 mm

Focal Length: 900 mm

Focal Ratio: f/9

Eyepiece Barrel Diameter: 2-inch 1.25-inch with included adapter

Diagonal: 90 degrees Star

Finderscope: 8x50 erect-image

Tripod: None

Mount Type: Vixen-style dovetail

Length: 36.2-inch / 92.0 cm

Weight: 10.0 lb / 4.5 kg