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esprit refractor - SkyWatcher Australia
ESPRIT-Case

Optional Accessories

ESPRIT 120ED TRIPLET APO REFRACTOR

ED Glass
  • Air Spaced 120mm 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

$4,999.99

Out of stock

SKU: SWESPRIT120 Categories: Esprits, OTAs

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  • Description
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Description

The Sky-Watcher 120mm Esprit 120ED 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! 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:

  • 120/840 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 SWESPRIT120
Optical Design Airspaced Apochromatic Triplet
Aperture 120
Focal Length 840mm
Focal Ratio f/7
Diameter of the corrected field 40mm
Visual Back Focus 225mm
Resolving Power 1.00″
Stellar Limit Magnitude 12.4
Highest Practical Magnification 240X
Light gathering power (compared to the unaided eye) 294
Focuser 3″ Crayford dual speed with 2″ and 1.25″ adaptor
Optical Tube Length 762mm
Optical Tube Weight 10kg

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5 Year Warranty

All Sky-Watcher products have a 5 year manufacturer warranty (not transferable).

For more information click HERE.

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