Esprit 120mm ED Triplet APO Refractor

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Esprit 120mm ED Triplet APO Refractor

Item #: S11420

Availability: Item is Backordered

$3,199.00
OR

Quick Overview

  • 120 mm apochromatic 3-element refractor
  • 840 mm (f/7)
  • Fully multi-coated
  • Thread-on field flattener
  • 3.0" focuser w/micro focus
  • 2" Diagonal with dielectric coatings
  • 9x50 RA erect-image finderscope
  • Canon camera adapter
  • Tube rings with CGE style dovetail bar
  • Aluminum foam lined case
  • 43mm image circle
  • OTA Weight: 22lbs.
  • OTA Length: 31.5" Extended and 27.375" Retracted
  • Back focus: 75mm

Details

Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

With their three-element air spaced objective lens design, false color is completely eliminated, yielding exceptional contrast and sharpness. The included 2-element field corrector guarantees a flat field across the entire imaging plane. The Sky-Watcher exclusive Helinear Track focusing system provides a smooth, rock-solid focuser with zero image shift.

All Sky-Watcher USA Esprit refractors come with a 9 x 50 right angle finderscope, 2-inch Star diagonal, 2-element field flattener*, camera adapter, D-style dovetail and padded case. Everything you need to get out under the stars.

Additional Information

Optical Design Refractor
Field Flattener Included, thread-on
Aperture (mm) 120 mm (4.72 in)
Focal Length 840 mm (33 in)
Focal Ratio 7
Focal Length of Eyepiece 1 (mm) No
Magnification of Eyepiece 1 No
Focal Length of Eyepiece 2 (mm) No
Magnification of Eyepiece 2 No
Finderscope 9x50, erect-image, right-angle
Diagonal 2", dielectric coatings
Tube Rings With 3" (CGE Style) dovetail plate
Mount Type No
Saddle Type No
Mounting Threads No
Motor Drive No
Tracking Rates No
Power No
Payload No
Mount Weight No
Highest Useful Magnification 283 x
Lowest Useful Magnification 17 x
Limiting Stellar Magnitude 12.9
Resolution (Rayleigh) 1.16 arc seconds
Resolution (Dawes) 0.97 arc seconds
Light Gathering Power (Compared to human eye) 294 x
Optical Coatings Fully multi-coated
Fully Illuminated Field 43 mm (1.69 in)
Optical Tube Length 30 in (762 mm)
Optical Tube Weight 23 lbs (10 kg)

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