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Sky-Watcher Quattro 250P Imaging Newtonian 10" (254 mm)

Sky-Watcher SKU: S11220 | Helix SKU: CTS11220

Overview




The new Sky-Watcher Quattro Imaging Newtonian with dual-speed focuser incorporates a superb mirror-set with two significant advantages over competing products. A 2" dual-speed 10:1 ratio focuser is included for excellent focusing precision. Additionally, the tube length has been slightly shortened to optimize performance for prime-focus photography

Specifications:

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SKU
S11220

UPC
050234112208

Optical Info

Optical Design
Newtonian

Mirror Coatings
94% Aluminum

Glass Type
Borosilicate

True Aperture (mm)
257

Primary Aperture (mm)
254

F/Ratio
4

Focal Length (mm)
1000

Secondary Diameter
89mm

Secondary Obstruction (by diameter)
35%

Secondary Obstruction by Area
12%

Observational Info

Dawes Limit
0.46

Rayleigh Limit
0.55

Limiting Mag.
14.5

Minimum Magnification
36

Maximum Magnification
500

Light Gathering (compared to next size down)
57%

General Info

Focuser
2" Dual Speed Crayford

OTA Length (Retract/Ext.)
36.5"

OTA Outer Diameter
11.375"

OTA Weight (with accessories)
36.5

Accessories

Included Finder
9x50 Finder

Included Diagonal
No

Mounting Accessories
Rings/V-Rail

Included Eyepieces
None

Included Case
No

Corrector
No (optional)






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Filed under: High-End Telescope Auctions (USA)