Sky-Watcher Black Diamond 300/1500 Dual Speed Newtonian OTA

300PDS Black Diamond — 300/1500 dual-speed Newtonian

The 300PDS Black Diamond is a 300 mm parabolic Newtonian with 1500 mm focal length and f/5 focal ratio. It combines visual observing with prime-focus imaging capability.

Imaging and fine focus

The PDS design uses a shortened tube and secondary-mirror positioning intended to provide imaging focus. Its 2-inch dual-speed Crayford focuser gives 10:1 fine adjustment. A correctly matched Sky-Watcher coma corrector is optional for improving star shapes away from the optical axis.

Tube and equipment

The manufacturer lists a 8×50 finder and 2-inch LET 28 mm eyepiece. The tube measures 355 mm in diameter by 1450 mm long and has a global published OTA weight of 18 kg. Sky-Watcher Japan instead lists approximately 25.5 kg for the 300PDS; this manufacturer discrepancy is unresolved. Select the mount for the complete imaging load and tube size.

Optical setup

As a Newtonian reflector, the telescope requires correct primary and secondary alignment. Fit the camera and any coma corrector using the correct adapter and spacing for that accessory.

Sky-Watcher manufacturer documentation

Compatibility notes

Global PDS page lists 18 kg, while Sky-Watcher Japan lists approximately 25.5 kg for 300PDS. The mass discrepancy is unresolved; 18 kg is labelled as the global published figure, not a measured assembled weight. Other regional accessory configurations are not combined.

Additional specifications