Evostar 80mm EDX OTA
4.5 ★
1,250 Ratings & Reviews
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₹69,930
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Evostar 80mm EDX OTA
Sky-Watcher’s Evostar apochromatic doublet refractors are the perfect blend of superior extra-low dispersion glass and affordability. The Evostar refractor lens assembly utilizes a proprietary combination of matched lenses, delivering tack-sharp stars with charcoal-black, contrast-rich skies. All ED glass elements are fluorite-based and feature our proprietary Metallic High-Transmission Coatings™ (MHTC™), virtually eliminating all false color while internal baffle prevent stray light from affecting your photography. Like the optics, the tube is beautifully crafted using aluminum and finished with a white metal-flake finish.
Using a doublet refractor instead of a triplet has some advantages: less glass means less weight, less weight means a less expensive telescope, so you can dedicate more money for your mount, camera, or accessories while benefiting from a lightweight astrophotography rig.
Sky-Watcher Evostar EDX refractors provide the finest images obtainable in their design class. These doublet refractors deliver dramatic, coal-black skies and faithful, contrast-rich views of planetary and deep-space phenomenon that are second to none. Sky-Watcher Evostar EDX refractors are the logical choice for the discriminating amateur astronomer looking for an investment in advanced instrumentation for exceptional viewing and astrophotography.
Evostars come in a foam-lined aluminum case with accessories, including: 2.8-inch Crayford-style focuser, tube rings, camera angle adjuster, thread-on dew shield, focuser adapter ring, spacer, 1.25 to 2-inch adapter, and a V-style dovetail.
Specifications
Optical Specifications
Optical Design (achro or apo) Apochromatic
Lens Coating (fully multi-coated)? Fully multi-coated
Lens design (doublet, triplet or Quad) ED Doublet (Air Spaced)
ED Glass FPL-53
Optical Quality Diffraction limited (1/4 wave)
Collimatable Cell No (Self Aligning Cell)
Primary Aperture (mm) 80mm
F/Ratio 7.5
Focal Length (mm) 600mm
Included Corrector Specifications
Optional Corrector/Reducer Specifications
Corrector Name Evostar 80ED 0.85x reducer/flattener
Optional Corrector/Reducer SKU S20200
Reduction (reducer only) 0.85x
Corrector - insertable or thread-on Thread on
Corrector Thread size M56x1 female/48mm male
Corrector Back Focus 55mm
Corrector illuminated field 43mm
F/Ratio with reducer installed 6.375
Focal Length with reducer installed 510mm
Corrector adapter needed? Included with telescope
Corrector allow for 2" filters? No* (Adapter needed)
Mechanical Specifications
Focuser Type Crayford
Focuser Size 2.8"
Focuser: Dual or Single Speed Dual speed (11:1 ratio)
Focuser: Rotatable? No
Camera Angle Adjuster? Yes
Compression Ring Yes
Retractable dew shield? No* (Removeable (thread-on))
OTA material Aluminum
Optical Tube length Retracted/Extended (inches) 22" / 18.7"
Dew Shield diameter (mm) 4.84" (123mm)
Optical Tube weight with included accessories (pounds) 7.3 pounds
Mounting Rings? Yes
Dovetail type V-style
Dovetail length 8"
Mounting ring threads (upper holes) 1/4-20
Accessories
Eyepieces No
Diagonal No
Mounting Hardware Mounting Rings/Dovetail
Camera Adapter No
Flatter or Corrector No
Additonal Accessories No
Collimation eyepiece None
Included finder No
Manual Yes
Case Yes
Shipping Weight 19.5 pounds
Shipping Dimensions/Weight 29.25" x 15" x 12"
Observational Info
Dawes Limit 1.45
Rayleigh Limit 1.75
Limiting Magnitude 12
Minimum Magnification 11x
Maximum Magnification 157x
Light Gather (compared to next size down) 24% (compared to 72ED)
Intended use Visual/Imaging
Included Items
No Included Items Available.
Suggested Accessories
No Suggested Accessories Available.
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