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Red Cat 51 - a novelty from the Taiwanese producer William Optics, a small apochromatic tube with high perspectives in Deep Sky astrophotography and nature photography. • construction: Petzval (4 elements in 3 groups), Apo with FPL-53 Ohara and FPL-51 glass
• lens diameter: 51 mm
• focal length: 250 mm
• lighted up: f / 4.9
• aluminum tube
• focus: adjusted manually, helical lift with rotation / cropping
• a dedicated Bahtin mask for precise focusing on stars included
• mounting: M48 at the end of the tube (no exit for the eyepiece)
• filter: 2 "(M48) filter mount in the exhaust rotator
• matrix coverage: full frame and APS-C (covers an area of over 44 mm in diameter)
• compatible cameras with M4 / 3 mount, Nikon, Canon, Sony Alfa, Pentax
• included with sun visor / dew shield
• tripod mount: dovetail Vixen / Arca Swiss (two-mode mount included)
• working length: 225 mm
• weight: 1.47 kg
• in a set with a transport bag with a spongy filling
• manufacturer's website: williamoptics.com/redcat-51 24 months
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