Orion 6in F/4 Newtonian astrograph OTA ( 10269) Telescopes opinie


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Orion 6in F/4 Newtonian astrograph OTA (#10269)
 
 
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Orion 6in F/4 Newtonian astrograph OTA (#10269)
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A complete optical tube with a 150 mm F / 4 mirror (6 inches, 600 mm focal length), with a 2 "/ 1.25" Crayford extraction with a 10: 1 microfocus and a good 8x50 finder, designed for astrophotography of nebular objects. It has a very bright parabolic mirror, relatively small dimensions and a weight of 5.5 kg with clamps, which makes this telescope a very fast and efficient astrograph.

Characteristics

• large glass mirror with a diameter of 150 mm (6 inches)
• f / 4 brightness great for astrophotography
• 94% main mirror surface efficiency, low expansion glass optics
• Crayford lift linearly mounted, in standard diameter 2 inches with reduction to 1.25 inches, with a 10: 1 microfocer

Technical parameters

• optical design: Newton reflector
• mirror figure: rotary paraboloid
• glass material: low thermal expansion (B270)
• reflecting layer: aluminum + hardening with silicon dioxide
• application: observation and photography of Deep Sky objects
• lens diameter: 150 mm
• focal length: 610 mm
• lighted up: f / 4.1
• resolution: 0.77 arcsec
• minimum useful magnification: 21x
• maximum useful magnification: 177x
• maximum theoretical magnification: 300x
• star range: 13.5 magnitude
• secondary mirror obstruction: 63 mm / 42% linear, 18% surface
• extractor: 2 "Crayford on linear bearings, with 10: 1 transmission and 1.25" reduction
• tube material: steel
• tube length: 571.5 mm
• included: 8x50 straight optical finder and standard dovetail Vixen-style rail for mounting
• weight: 5.75 kg

Warranty

12 months








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