The new 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.
Two versions of the QUATTRO 10 OTA's are available:
QUATTRO-10S with Steel Tube
QUATTRO-10CF with Carbon Fibre Tube (illustrated)
CARBON FIBRE TUBE (QUATTRO-10CF only): Carbon fibre is a strong and lightweight material and has much better thermal stability compared to a steel tube. This is especially important for astro-photographers dealing with long exposure times. Imaging telescopes made of less thermally stable material can deviate from optimum focus after long time exposures. With a carbon fibre tube, it can remain in focus for a longer period of time and long exposure images will stay clear and in focus.
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 drawtubeby 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: Both models feature paraboloidal primary mirrors made of low thermal expansion Pyrex glass resulting in substantially shorter cooling-down times.
- Highest Practical Power (Potential) x508
- Diameter of Primary Mirror 254mm
- Telescope Focal Length 1000mm (f/4)
- Note: Eyepieces NOT supplied
- 9x50 Finderscope
- Parabolic Primary Mirror (Pyrex)
- 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