

\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 color 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.
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.
| SKU | S11420 |
| UPC | 050234114202 |
| Optical Info | |
|---|---|
| Optical Design | ED Triplet Refractor |
| Lens Coatings | Fully Multi-Coated |
| Glass Type | BK7 (2)/FPL-53(ED) |
| Primary Aperture (mm) | 120 |
| F/Ratio | 7 |
| Focal Length (mm) | 840 |
| Observational Info | |
| Dawes Limit | 0.97 |
| Rayleigh Limit | 1.16 |
| Limiting Mag. | 12.9 |
| Minimum Magnification | 17 |
| Maximum Magnification | 236 |
| Light Gathering (compared to next size down) | 44% |
| General Info | |
| Focuser | 3.4" Dual Speed R&P |
| OTA Length (Retract/Ext.) | 27.4"/31.5" |
| OTA Outer Diameter | 6.875" |
| OTA Weight (with accessories) | 22 |
| Accessories | |
| Included Finder | 8x50 RACI |
| Included Diagonal | 2" Dielectric |
| Mounting Accessories | Rings/D-Rail |
| Included Eyepieces | None |
| Included Case | Yes |
| Corrector | Yes |