Our take on the Sky-Watcher Esprit 100 ED Super APO Triplet
The Sky-Watcher Esprit 100 is a premium triplet refractor telescope. These are fantastic sets that come with a great hard case, a couple of good quality eyepieces, a reducer, a guide scope and some excellent mounting hardware. This is one of the best telescope options for visual astronomy and astrophotography.
Designed with the discerning astrophotographer in mind, Sky-Watcher's top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more. With the Esprit's three-element, air spaced objective lens design, false colour is virtually eliminated, yielding exceptional contrast and sharpness. 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.
Description of the Esprit 100 ED
In addition to superb optics, all Esprits feature exclusive dual-speed, Helinear track focusers, which provide smooth, rock-solid focusing with zero image shift. Using a captain's wheel design all focusers can be rotated, giving astrophotographers flexibility when framing their image.
As is customary, Sky-Watcher supplies everything you need to get out under the stars, including a 2-element field corrector, which guarantees a flat field across the entire imaging plane. All Esprit refractors also come with an 8x50 right angle finderscope, 2-inch star diagonal, M48 camera adapter, mounting hardware, and padded case.
Quick Overview
- Triplet super-apochromatic design
- Three-element, air-spaced optical assembly virtually eliminates false colour
- 100mm aperture, 550mm focal length, f/5.5 focal ratio
- 3.4-inch dual-speed rack-and-pinion, Helinear track focuser
- Rolled steel optical tube with white, glossy finish
- Included accessories: field flattener, tube rings, D-style dovetail, 8x50 right-angle finderscope, M48 camera adapter, 2-inch dielectric diagonal, and padded hard case
What's in the Box
- Field flattener
- Tube rings
- D-style dovetail
- 8x50 right-angle finderscope
- M48 camera adapter
- 2-inch dielectric diagonal
- Padded hard case
Specifications
| Optical Design |
ED Triplet Refractor |
| Lens Coatings |
Fully Multi-Coated |
| Glass Type |
BK7 (2)/FPL-53(ED) |
| Primary Aperture (mm) |
100 |
| F/Ratio |
5.5 |
| Focal Length (mm) |
550 |
| Observational Info |
|
| Dawes Limit |
1.16 |
| Rayleigh Limit |
1.4 |
| Limiting Mag. |
12.5 |
| Minimum Magnification |
14 |
| Maximum Magnification |
197 |
| Light Gathering (compared to next size down) |
56% |
| General Info |
|
| Focuser |
3.4" Dual Speed R&P |
| OTA Length (Retract/Ext.) |
18.3"/24.5" |
| OTA Outer Diameter |
5.75" |
| OTA Weight (with accessories) |
16 |
| Accessories |
|
| Included Finder |
8x50 RACI |
| Included Diagonal |
2" Dielectric |
| Mounting Accessories |
Rings/D-Rail |
| Included Eyepieces |
None |
| Included Case |
Yes |
| Corrector |
Yes |
