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The new Sky-Watcher Quattro-8S Steel Tube with the 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): | 200 |
Focal length (mm): | 800 |
Focal ratio: | F/4 |
Max. useful magnification: | 400 x |
Light gathering capacity: | 820 x |
Resolving capacity: | 0.58 |
Limiting stellar magnitude (mag): | 13.3 |
Focuser: | 2'' Crayford |
General | |
Series: | Quattro |
Tube weight (kg): | 9 |
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) |