The new Sky-Watcher EXPLORER-250PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-250P Black Diamond Series, but with two significant advantages. A Dual-Speed 10:1 ratio focuser is now included for excellent focusing precision. Also the tube length has been slightly shortened to optimise performance for prime-focus photography.
Even better performance for astro-photography and visual use can be achieved when used in combination with Sky-Watcher’s Newtonian coma corrector (Prod.Code 20233)
Standard Specification:
- Magnifications (with eyepieces supplied) x43
- Highest Practical Power (Potential) x500
- Diameter of Primary Mirror 254mm
- Telescope Focal Length 1200mm (f/4.7)
- Eyepieces Supplied 28mm LET (2"/50.8mm)
- 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 Crayford Focuser
- 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.
