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:
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Add to cartThe 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:
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 |