SKY-WATCHER CLASSIC 250P DOBSONIAN (S11620)

797.30$

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SKY-WATCHER CLASSIC 250P DOBSONIAN

The SKY-WATCHER CLASSIC 250P DOBSONIAN 254mm/1200mm (10″) has a « paraboloidal » primary mirror to eliminate spherical aberration and a four-arm, secondary- mirror bracket with fine supports (0.5mm thick), to reduce diffraction spikes and light loss. In addition, this model include a 2″ focuser with a 1.25″ adapter, allowing the use of either eyepiece size. This model also include the new feature-tension control handle.

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Optical Info:
Optical Design: Newtonian
Mirror Coatings: 94% Aluminum
Glass Type: Borosilicate
Primary Aperture (mm): 254
F/Ratio: 4.7
Focal Length (mm): 1200
Secondary Diameter: 64mm
Secondary Obstruction (by diameter): 25%
Secondary Obstruction by Area: 6%
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" Crayford
OTA Length (Retract/Ext.): 45"
OTA Outer Diameter: 11.375"
OTA Weight (with accessories): 28
Dob Base Weight: 25
Dob Base Measurements: 29"x20.5"
Zenith Eyepiece Height: 48"

Accessories:
Included Finder: 9x50 Finder
Included Diagonal: No
Included Eyepieces: 25/10 Super (modified Kellner)
Magnification w/ Included Eyepieces: 48x/120x
Included Case: No
Corrector: No

Classic 250P Dobsonian
Eyepieces: 25mm and 10mm Super (modified Kellner)
9x50 Finder

Classic Dobsonian Manual