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Model: sw300potaPart Number: 10222
The Sky-Watcher Explorer 300P DS Newtonian Reflector incorporates the same superb mirror-set as the original Explorer-300P but with two significant advantages: A 1.25"/2" Dual-Speed 10:1 ratio focuser and a slightly shorter tube length for prime-focus photography.
"Detail Explosion: Late into the night we selected the globular cluster M13 from the hand-controller. As it swung into the field of view it was breathtaking, with swarms of stars looking like bees around a honey pot. The view was so good that we noticed a dark feature, commonly known as the Propeller, superimposed on one side of the cluster. It was easily the best view of the cluster we’ve ever had….For crystal clear views of deep space, this is hard to beat!” BBC Sky At Night Magazine
Specification:
Magnifications (with eyepieces supplied) x53.5
Highest Practical Power (Potential) x610
Diameter of Primary Mirror 305mm
Telescope Focal Length 1500mm (f/4.9)
Eyepieces Supplied 28mm LET (2"/50.8mm)
9x50 Finderscope
Parabolic Primary Mirror
1.25"/2" Dual-Speed 10:1 Crayford Focuser
0.5mm Ultra-Thin Secondary Mirror Supports
Supplied with Tube Rings and Losmandy -type dovetail bar
44% more Light-Gathering than 250mm
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We are often asked this question. Sky-Watcher do not use Pyrex glass for their mirrors. They used to (many years ago), but they now use an alternate low-expansion glass. There is no change in performance. Some retailers still mistakenly use the old 'px' (px for Pyrex) product name. We suspect this is what is causing confusion.