Sky-Watcher Esprit 100 mm ED APO Triplet Refractor
What We Like About the Sky-Watcher Esprit 100 Refractor
- The 100mm air-spaced ED APO Triplet optics, made of FPL-53 ED and Schott BK-7 glass, and coupled with multi-layers of a high transmission coating, yield sharp, high contrast views with no extraneous color.
- A thread-on doublet field flattener is included in the Sky-Watcher 100mm Esprit Refractor package, providing a flat field from edge-to-edge.
- A good focuser is imperative when imaging, and the SW Esprit 100mm comes with a 2.7" linear power focuser with micro-focusing capabilities.
- The dew shield on the Esprit 100ED retracts, making the length 7" shorter for storage and travel.
- A nice selection of accessories comes with this Skywatcher Esprit, including a focuser 3.4" to 2" ring adapter, 2" dielectric diagonal with 1.25" adapter, a 9 x 50 erect-image finder, a Canon camera adapter, tube brings, and an 18.5" x 10.5" x 22.5" aluminum case. Add a mount (the rings have a Losmandy- style dovetail bar) and a few eyepieces, and you're good to go. Curious to learn more? Check out the comprehensive video below!
More About Sky-Watcher Esprit 100ED Triplet APO Refractor
Designed with the discerning astrophotographer in mind, Sky-Watcher 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, made of high quality Schott BK-7 and FPL-53 ED glass, false color is completely eliminated, yielding exceptional contrast and sharpness. Knife-edge baffles in the optical tube increase contrast even further, and 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, a 2" star diagonal with 1.25" adapter, a 2-element thread-on field flattener, and a camera adapter as well as a D-style dovetail and padded case.
Please Note : When using a CCD camera, a custom coupling ring is needed in order to attach the camera and its accessories to the field flattener. This ring needs to have a female M66x1 thread to connect to the field flattener, a compatible thread for the first component of the optical train, and the length from the back of the field flattener to the CCD sensor must be exactly 63 mm.
Sky-Watcher USA 100 ED APO Triplet Esprit Refractor Specifications
- Optical Design: Apochromatic Refractor
- Aperture: 100 mm (3.94")
- Focal Length: 550 mm
- Focal Ratio: f/5.5
- Highest Practical Power: 150X
- Coatings: Fully multi-coated
- Field Flattener: Thread-on doublet
- Focuser: 2.7" linear power w/micro focus with 2" reduction adapter
- Diagonal: 2" with dielectric coatings with 1.25" adapter
- Finderscope: 9x50 RA erect-image
- Camera Adapter: M48 Canon EOS
- Tube Ring: Includes D style dovetail bar
- Dew Shield: Retractable
- Case: Aluminum foam-lined. 18.5" x 10.5" x 22.5"
- Image Circle: 40mm
- OTA Weight: 16 lb.
- OTA Length: 24.5" Extended and 18.3" Retracted
- Back focus: 68.819mm