SkyWatcher APO Esprit 100 with Flattener
Designed with the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line 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, 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. All Sky-Watcher USA Esprit refractors come with a 8 x 50 right angle finderscope, 2-inch Star diagonal, 2-element field flattener*, camera adapter, D-style dovetail and padded case. Everything you need to get out under the stars.
| Optical Info | |
|---|---|
| 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 |