$99 UPS Ground Packing & Shipping
Description
The exciting new Mak-Newtonian from Sky-Watcher is just what astrophotographers and serious visual observers have been looking for.
The Mak-Newtonian design provides large aperture apochromatic performance with exceptional field correction in a compact, affordable package. Compared to a similarly sized Schmidt-Newtonian, the Mak-Newtonian yields a sharper image with more contrast. Naturally, the Mak-Newtonian is an excellent visual performer, too.
Specifications
| Optical Info | |
|---|---|
| Optical Design | Mak-Newtonian |
| Mirror Coatings | 94% Aluminum |
| Lens Coatings | Fully Multi-Coated |
| Glass Type | BK7/Borosilicate |
| Primary Aperture (mm) | 203 |
| F/Ratio | 5.3 |
| Focal Length (mm) | 1000 |
| Secondary Diameter | 64mm |
| Secondary Obstruction (by diameter) | 34% |
| Secondary Obstruction by Area | 11% |
| Observational Info | |
| Dawes Limit | 0.61 |
| Rayleigh Limit | 0.74 |
| Limiting Mag. | 13.9 |
| Minimum Magnification | 27 |
| Maximum Magnification | 374 |
| Light Gathering (compared to next size down) | 11% |
| General Info | |
| Focuser | 2" Dual Speed Crayford |
| OTA Length (Retract/Ext.) | 37.5" |
| OTA Outer Diameter | 9.5" |
| OTA Weight (with accessories) | 29 |
| Accessories | |
| Included Finder | 8x50 RACI |
| Included Diagonal | No |
| Mounting Accessories | Rings/V-Rail |
| Included Eyepieces | None |
| Included Case | No |
| Corrector | No |