Esprit 80ED Triplet APO Refractor

The Sky-Watcher 100mm Esprit 80ED Triplet APO Refractor is a professional instrument for the most demanding and exacting astro-photographers.

The air spaced apochromatic triplet lenses use the remarkable Ohara FPL-53 ED (extra low dispersion) glass, with exceptional colour correction over the entire visible spectrum there is no chromatic aberration even on bright objects!

Each element is fully multi-coated with Sky-Watcher’s proprietary Metallic High-Transmission Coatings™ (MHTC)™, producing a transmission rate that rivals any refractor on the market.

Key features:

  • Aperture: 80mm
  • Focal length: 400mm
  • Focal ratio: f/5
  • Air Spaced 80mm Apochromatic Triplet
  • FPL-53 extra low dispersion glass
  • Zero detectable colour fringing even on bright objects
  • Diffraction limited optics
  • Fully multi coated lenses
  • 3″ CNC machined 11:1 dual speed linear power focuser – rotatable
  • Indexed focuser tube
  • Knife-edge baffled system to enhance contrast

 

 

$3,099.00 inc GST

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The Sky-Watcher 80mm Esprit 80ED Triplet APO Refractor incorporates an air spaced 100mm Apochromatic Triplet lens system. made from FPL-53 extra low dispersion glass with knife edge baffles reduce internal reflections and increase contrast, helping to bring out faint structure in deep sky objects.

A 2-element field flattener is included to iron out the natural off-axis astigmatism and field curvature of the objective lens, leaving a fully corrected 42mm field of view.

The Sky-Watcher exclusive Helinear Track 11:1 dual speed focuser is rock solid with zero image shift and a 3″ barrel to avoid vignetting. Designed with photography in mind, it sits on two tracks above and below the barrel to prevent flexure with a heavy camera attached, and is fully rotatable to perfectly frame a target on the sensor.

 

In The Box:

  • 80/400 Apochromatic Refractor
  • Fixed Dew Shield
  • Field Flattener with M48 Thread
  • T2 Canon Camera Adapter
  • 2″ Dielectric Star Diagonal
  • 9×50 Right Angled Erect Image Diagonal
  • D Style dovetail Bar
  • 2″ to 1.25″ Eyepiece Adaptor
  • Aluminium Foam-Lined Case

 

 

Specifications:

 

Model SWESPRIT80
Optical Design Airspaced Apochromatic Triplet
Aperture 80
Focal Length 400mm
Focal Ratio f/5
Diameter of the corrected field 33mm
Visual Back Focus 160mm
Resolving Power 1.50″
Stellar Limit Magnitude 11.8
Highest Practical Magnification 160X
Light gathering power (compared to the unaided eye) 131
Focuser 2.7″ Crayford dual speed with 2″ and 1.25″ adaptor
Optical Tube Length 450mm
Optical Tube Weight 4.05kg