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The new Sky-Watcher Quattro-10S Steel Tube with fast f/4 focal ratio, have been specially designed for high quality astrophotography with short exposure times. The tube interior has knife-edge ray-traced baffles.
2" DUAL-SPEED LINEAR POWER FOCUSER:
The new linear power focuser utilizes 4 precision ball bearings to support the drawtube and provide great stability and zero image shift while supporting a heavy eyepiece or camera. Moving the drawtube by the roller rather than a rack and pinion ensures exceptionally smooth operation, great feel, and precise adjustability. The dual-speed feature has a second focus knob that has a 10:1 speed reduction to provide the super-fine adjustments even the most demanding users can appreciate.
PYREX MIRRORS:
The primary mirror is made of low thermal expansion Pyrex glass resulting in substantially shorter cooling-down times.
| Optics | |
|---|---|
| Type: | Reflector |
| Type of build: | Parabolic Newtonian |
| Aperture (mm): | 250 |
| Focal length (mm): | 1000 |
| Focal ratio: | F/4 |
| Max. useful magnification: | 500 x |
| Light gathering capacity: | 1280 x |
| Resolving capacity: | 0.46 |
| Limiting stellar magnitude (mag): | 13.8 |
| Focuser: | 2'' Crayford |
| General | |
| Series: | Quattro |
| Tube weight (kg): | 15 |
| Warranty: | 2 years |
| Included accessories | |
| Finderscope: | 9 x 50 |
| Recommended for: | |
| Beginners: | Not recommended |
| Intermediate: | Yes |
| Advanced: | Yes |
| Area of application | |
| Nature observation: | No |
| Moon & planets: | Yes |
| Nebula & galaxies | Yes |
| Astrophotography: | Yes |
| Sun: | No (only with appropriate Sun filter) |
