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Not Returnable
Please note that special order products are not returnable.
- 305 mm Newtonian reflector
- 1200 mm (f/4)
- Fully multi-coated borosilicate mirrors
- 2” dual-speed 10:1 linear power focuser
- 8×50 finderscope
- Tube rings with D-style dovetail bar
The new Sky-Watcher Quattro Imaging Newtonian with dual-speed focuser incorporates a superb mirror-set with two significant advantages over competing products. A 2" dual-speed 10:1 ratio focuser is included for excellent focusing precision. Additionally, the tube length has been slightly shortened to optimize performance for prime-focus photography.
Even better performance for astro-photography, and visual use, can be achieved when used in combination with the Sky-Watcher Quattro coma corrector.
Specifications
| Optical Info | |
|---|---|
| Optical Design | Newtonian |
| Mirror Coatings | Radiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity |
| Glass Type | Borosilicate |
| Primary Aperture (mm) | 305 |
| Primary Edge Thickness | 38mm |
| F/Ratio | 4 |
| Focal Length (mm) | 1200 |
| Secondary Diameter | 102mm |
| Secondary Obstruction (by diameter) | 33% |
| Secondary Obstruction by Area | 11% |
| Observational Info | |
| Dawes Limit | 0.38 |
| Rayleigh Limit | 0.46 |
| Limiting Mag. | 14.9 |
| Minimum Magnification | 43 |
| Maximum Magnification | 600 |
| Light Gathering (compared to next size down) | 44% |
| General Info | |
| Focuser | 2" Dual Speed Crayford |
| OTA Length (Retract/Ext.) | 42.5" |
| OTA Outer Diameter | 14.25" |
| OTA Weight (with accessories) | 57 lbs |
| Accessories | |
| Included Finder | 9x50 Finder |
| Included Diagonal | No |
| Mounting Accessories | Rings/D-Rail |
| Included Eyepieces | None |
| Included Case | No |
| Corrector | No (optional) |