The QUATTRO series with their fast f/4 focal ratios, have been specially designed for high quality astrophotography with short exposure times. They are of course also fine telescopes for visual observations. 10" Quattro Tube interiors have knife-edge ray-traced baffles.
2" DUAL-SPEED LINEAR POWER FOCUSER (both models): The new linear power focuser utilises 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: Features paraboloidal primary mirror made of low thermal expansion Pyrex glass resulting in substantially shorter cooling-down times.
(Please note the Quattro-250P was previously named Quattro-10S)
Standard Specification:
- Highest Practical Power (Potential) x508
- Diameter of Primary Mirror 254mm
- Telescope Focal Length 1000mm (f/4)
- Note: Eyepieces NOT supplied
- 9x50 Finderscope
- Parabolic primary & secondary mirror with Radiant™ Aluminum Quartz (RAQ™) coating providing up to 94% reflectivity with optimal durability and long term performance
- 2" (50.8mm) Dual-Speed 10:1 Linear Power Focuser
- Tube Rings and Dovetail Bar
- 0.5mm Ultra-Thin Secondary Mirror Supports
- 56% more Light-Gathering than 200mm
PARABOLIC PRIMARY MIRRORSFeatures High Quality Parabolic Primary Mirrors to eliminate spherical aberrations inherent in 'fast' focal lengh reflectors with spherical primary mirrors. The mirrors are parabolized to bring all the light rays to the same focal point to give sharp, constrasty images, which are full of detail.
