Vixen Astronomical Telescope Porta II Background Table Series Porta IIR 130 Sf 39954-3
Style name: lens barrel: R130Sf
? Adopting the "free stop type" in which the lens barrel is fixed as it is at the position where the hand is released, the operation to change the direction of the lens barrel greatly is easy and convenient. Equipped with fine movement handle (vertical azimuth fine movement) for searching and chasing stars with fine movement. Adopting the world standard "Alimiso type (standard)", it is possible to place a lens barrel and to install it easily.
Easy to handle "Porta II History Table"
Porta ? History table realized high rigidity and operability so that more users can use with confidence. As the first astronomical telescope, or respond with ease of use to the need to enjoy stars easily.
? Reflective type "R130Sf lens barrel" with 130 mm aperture
Reflective lens barrel that gathers light from the celestial body with parabolic primary mirror, folds it by secondary mirror at 90 degrees, and reflects to the eyepiece. Its feature is that chromatic aberration does not occur because of its simple structure, the sharpness of the star image captured at the center of the view is superior to other optical formats.
? It is suitable for observation of pale objects such as nebulae and star clusters because a bright view is obtained.
? Manufacturer model number: 39954
? Objective lens: reflective type · paraboloidal surface · multi-coat
? Effective diameter: 130 mm
? Focal length: 650 mm
? Port size ratio F: F 7.5
? Concentration force: 131 times the naked eye
? Extreme grade: 11.3 stars
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Filed under: High-End Telescope Auctions (USA)