OPTIMISED FOR PRIME FOCUS ASTRO-PHOTOGRAPHY

The new Sky-Watcher EXPLORER-150PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-150P 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:

Magnification (with eyepiece supplied) x30

Highest Practical Power (Potential) x300

Diameter of Primary Mirror 150mm

Telescope Focal Length 750mm (f/5)

Eyepiece Supplied 25mm (1.25"/31.7mm)

6x30 Finderscope

Parabolic Primary Mirror

2" (50.8mm) Dual-Speed 10:1 Crayford Focuser

0.5mm Ultra-Thin Secondary Mirror Supports

33% more Light-Gathering than 130mm

150mm (6") f/5 Parabolic Dual-Speed Newtonian Reflector 

The new Sky-Watcher EXPLORER-150PDS range of Newtonian Reflector incorporates the same superb mirror-set as the Explorer-150P 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:

Magnification (with eyepiece supplied) x30

Highest Practical Power (Potential) x300

Diameter of Primary Mirror 150mm

Telescope Focal Length 750mm (f/5)

Eyepiece Supplied 25mm (1.25"/31.7mm)

6x30 Finderscope

Parabolic Primary Mirror

2" (50.8mm) Dual-Speed 10:1 Crayford Focuser

0.5mm Ultra-Thin Secondary Mirror Supports

EQ3-2 Equatorial Mount with Aluminium Tripod

33% more Light-Gathering than 130mm

150mm (6") f/5 Parabolic Dual-Speed Go-To Newtonian Reflector 

The new Sky-Watcher EXPLORER-150PDS range of Newtonian Reflector incorporates the same superb mirror-set as the Explorer-150P 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:

Magnification (with eyepiece supplied) x30

Highest Practical Power (Potential) x300

Diameter of Primary Mirror 150mm

Telescope Focal Length 750mm (f/5)

Eyepiece Supplied 25mm (1.25"/31.7mm)

6x30 Finderscope

Parabolic Primary Mirror

2" (50.8mm) Dual-Speed 10:1 Crayford Focuser

0.5mm Ultra-Thin Secondary Mirror Supports

EQ3 PRO Go-To Equatorial Mount with Aluminium Tripod

42,900+ Object SynScan Computer Database

33% more Light-Gathering than 130mm

200mm (8") f/5 Parabolic Dual-Speed Newtonian Reflector OTA 

The new Sky-Watcher EXPLORER-200PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-200P 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:

Magnification (with eyepiece supplied) x36

Highest Practical Power (Potential) x400

Diameter of Primary Mirror 200mm

Telescope Focal Length 1000mm (f/5)

Eyepiece Supplied 28mm LET (2"/50.8mm)

9x50 Finderscope

Parabolic Primary Mirror

2" (50.8mm) Dual-Speed 10:1 Crayford Focuser

0.5mm Ultra-Thin Secondary Mirror Supports

77% more Light-Gathering than 150mm

200mm (8") f/5 Parabolic Dual-Speed Newtonian Reflector 

The new Sky-Watcher EXPLORER-200PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-200P 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)

*Note: the Explorer-200PDS has a larger 58mm secondary mirror, for enhanced field illumination, compared to the Explorer-200P which has a 52mm secondary.

Standard Specification:

Magnification (with eyepiece supplied) x36

Highest Practical Power (Potential) x400

Diameter of Primary Mirror 200mm

Telescope Focal Length 1000mm (f/5)

Eyepiece Supplied 28mm LET (2"/50.8mm)

9x50 Finderscope

Parabolic Primary Mirror

2" (50.8mm) Dual-Speed 10:1 Crayford Focuser

0.5mm Ultra-Thin Secondary Mirror Supports

EQ5 Equatorial Mount with 1.75" Stainless Steel Tripod

77% more Light-Gathering than 150mm

200mm (8") f/5 Parabolic Dual-Speed Go-To Newtonian Reflector 

The new Sky-Watcher EXPLORER-200PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-200P 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)

*Note: the Explorer-200PDS has a larger 58mm secondary mirror, for enhanced field illumination, compared to the Explorer-200P which has a 52mm secondary.

Standard Specification:

Magnification (with eyepiece supplied) x36

Highest Practical Power (Potential) x400

Diameter of Primary Mirror 200mm

Telescope Focal Length 1000mm (f/5)

Eyepiece Supplied 28mm LET (2"/50.8mm)

9x50 Finderscope

Parabolic Primary Mirror

2" (50.8mm) Dual-Speed 10:1 Crayford Focuser

0.5mm Ultra-Thin Secondary Mirror Supports

HEQ5 PRO Go-To Equatorial Mount with 1.75" Stainless Steel Tripod

42,900+ Object SynScan Computer Database

77% more Light-Gathering than 150mm

254mm (10") f/4.7 Parabolic Dual-Speed Newtonian Reflector OTA 

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 Mirror

2" (50.8mm) Dual-Speed 10:1 Crayford Focuser

0.5mm Ultra-Thin Secondary Mirror Supports

56% more Light-Gathering than 200mm

254mm (10") f/4.7 Parabolic Dual-Speed Go-To Newtonian Reflector 

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 Mirror

2" (50.8mm) Dual-Speed 10:1 Crayford Focuser

0.5mm Ultra-Thin Secondary Mirror Supports

EQ6 PRO Go-To Equatorial Mount with 2" Stainless Steel Tripod

42,900+ Object SynScan Computer Database

56% more Light-Gathering than 200mm

305MM (12") F/4.9 PARABOLIC DUAL-SPEED NEWTONIAN REFLECTOR  

The new Sky-Watcher EXPLORER-300PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-300P 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

305MM (12") F/4.9 PARABOLIC DUAL-SPEED NEWTONIAN REFLECTOR 

The new Sky-Watcher EXPLORER-300PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-300P 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) 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

2" (50.8mm) 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

205mm f/4 Dual-Speed Parabolic Imaging Newtonians 

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. Tube interiors have knife-edge ray traced baffles.

Two versions of the QUATTRO-8 OTA's are available:

QUATTRO-8S with Steel Tube
QUATTRO-8CF with Carbon Fibre Tube (illustrated)

CARBON FIBRE TUBE (QUATTRO-8CF 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.

Standard Specification:

Highest Practical Power (Potential) x410

Diameter of Primary Mirror 205mm

Telescope Focal Length 800mm (f/4)

Note: Eyepieces NOT supplied

9x50 Finderscope

Parabolic Primary Mirror (Pyrex)

2" (50.8mm) Dual-Speed 10:1 Linear Power Focuser

Tube Rings & Dovetail Bar

0.5mm Ultra-Thin Secondary Mirror Supports

77% more Light-Gathering than 150mm

note: equatorial mount not included

250mm f/4 Dual-Speed Parabolic Imaging Newtonians 

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. Tube interiors have knife-edge ray-traced baffles.

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.

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 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