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Sky-Watcher Esprit 100mm ED Triplet APO Refractor
Condition: Brand New in Original Packaging
- Three-element air spaced objective lens
- False color is completely eliminated
- Helinear Track focusing system
- Vignette-free images on large full-frame sensors
- Delivers optimum visual and photographic performance
- Metallic High-Transmission Coating
- Millimeter markings to assist with accurate focusing
Designed with the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit 100mm ED Triplet APO Refractor delivers the kind of imaging performance one would expect from telescopes costing thousands of dollars more.
With the Esprit 100mm 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.
Chromatic aberrations and field curvature are things of the past with the Sky-Watcher Esprit series of super APO triplet refractors. Whether you’re photographing with a CCD or a full-frame DSLR, Esprits produce crystal clear images that rival the performance of other refractors costing thousands of dollars more. The Esprit series features extra-large image circles, providing astrophotographers with vignette-free images on large full-frame sensors.
As you explore beyond the tube’s white glossy finish, it becomes apparent that the Esprit’s optical components are designed to court glass snobs near and far. The Esprit series is built around a fast focal length, air-spaced triplet objective, and a proprietary combination of matched lenses, designed to deliver optimum visual and photographic performance.
Sky-Watcher’s signature Metallic High-Transmission Coating (MHTC) – utilizing magnesium fluoride and zirconium oxide – is able to produce a transmission rate that challenges any other refractor on the market. All objective lenses are air-spaced, cooling to an ambient temperature faster than optical tubes using oil-spaced optics. Sky-Watcher's optical tubes are fully baffled to eliminate any stray light.
Solid and Precise Focusing
Whether you’re using the Esprit for imaging or visual use, Sky-Watcher’s proprietary 3.4" Dual Speed R&P focuser provides precise 10:1 rack-and-pinion focusing with zero image shift. The focusers are rotatable, allowing astrophotographers to easily frame their image. The large aperture focuser includes millimeter markings to assist with quick and accurate focusing.
What's in the Box
- Sky-Watcher Esprit 100mm ED Triplet APO Refractor
- 3.4" Dual Speed R&P
- 8x50 Right Angle Correct Image Finder
- 2" Dielectric Diagonal
- 2-Element Field Flattener
- Canon 48mm Camera Adapter with Spacers
- Rings/D-Rail Mounting
- Padded Case
- Two Year Warranty
- Optical Design: ED Triplet
- Primary Aperture (mm): 100mm (4")
- Focal Ratio: 5.5
- Focal Length (mm): 550mm
- Glass Type: Schott/Ohara ED
- Lens Coatings: Fully Multi-Coated
- OTA Length: Dew Shield Retracted: 18.3" Dew Shield Extended: 24.5"
- OTA Outer Diameter: 5.75"
- OTA Weight (with accessories): 16 lbs.
- Focuser: 3.4" Dual Speed R&P
- Included Eyepieces: None
- Included Diagonal: 2" Dielectric
- Included Finder: 8×50 Right Angle Correct Image
- Includes Case: Yes
- Mounting Accessories: Rings/D-Rail
- Corrector: Yes, included field flattener.
- Image Circle (w/ Flattener): 40mm
- Other Included Items: Canon 48mm camera adapter with spacers
- Dawes Limit: 1.16
- Rayleigh Limit: 1.4
- Limiting Magnitude: 12.5
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Filed under: High-End Telescope Auctions (USA)