Description
If you are an astro-photographer looking for a fast optical system at a fantastic price then the Quattro series is for you.
The Sky-Watcher 8″ f/4 Quattro Imaging Newtonian has . . .
- 205mm aperture/800mm focal length f/4 Newtonian reflector optics
- Fully multi-coated borosilicate mirrors
- 2 10:1 ratio dual-speed focuser
- 8×50 finderscope
- Tube rings with V-style dovetail bar
The 8″ Sky-Watcher Quattro Imaging Newtonian with dual-speed focuser is optimized for wide-field deep space imaging, but can also be used for pleasing visual observing. It incorporates a superbly-figured multi-coated borosilicate optical glass mirror-set. Additionally, the tube length has been slightly shortened to optimize performance for wide-field prime-focus photography. Even better field edge performance for astrophotography, and visual use, can be achieved by adding the Sky-Watcher Quattro coma corrector.
This Sky-Watcher 8″ Quattro imaging Newtonian is ultra-fast and incredibly simple to use. The f/4 optical system allows the user to capture wide field images of faint deep space objects such as nebulae, open clusters, and galaxies over six times faster than using an f/10 system. This gives you the ability to acquire more images in less time. The Newtonian optical design is one of the most basic, and therefore trouble-free, systems available to astrophotographers.
Tech Details:
| Aperture | 8″ |
|---|---|
| Focal Length | 800mm |
| Focal Ratio | f/4 |
| Weight | 21 pounds |
| Optical Coatings | Fully Multi-Coated |
| Supplied Eyepiece | None |
| Telescope Type | Reflector |
| View Finder | 8×50 |
| Warranty | 2 years |
| SKU | S11210 |
| UPC | 050234112109 |
| Optical Info | |
|---|---|
| Optical Design | Newtonian |
| Mirror Coatings | Radiant Aluminum Quartz (RAQ) coatings with 94% reflectivity |
| Glass Type | Borosilicate |
| Primary Aperture (mm) | 203 |
| F/Ratio | 4 |
| Focal Length (mm) | 800 |
| Secondary Diameter | 70mm |
| Secondary Obstruction (by diameter) | 34% |
| Secondary Obstruction by Area | 12% |
| Observational Info | |
| Dawes Limit | 0.57 |
| Rayleigh Limit | 0.69 |
| Limiting Mag. | 14 |
| Minimum Magnification | 29 |
| Maximum Magnification | 400 |
| Light Gathering (compared to next size down) | 78% |
| General Info | |
| Focuser | 2″ Dual Speed Crayford |
| OTA Length (Retract/Ext.) | 28″ |
| OTA Outer Diameter | 9.375″ |
| OTA Weight (with accessories) | 21 |
| Accessories | |
| Included Finder | 9×50 Finder |
| Included Diagonal | No |
| Mounting Accessories | Rings/V-Rail |
| Included Eyepieces | None |
| Included Case | No |
| Corrector | No (optional) |
Supplied Accessories:
8×50 Finder Tube Rings with Vixen style dovetail bar
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