Sharpstar RC2508 (0.8x) is a focal length reducer dedicated to use in the most sophisticated astrophotographic sets based on Ritchey - Chrétien (RC) telescopes with diameters in the range of 200 - 800 mm and lenses in the range f / 6 - f / 9.

The optical construction of this reducer is a classic triplet with an air gap. In order to eliminate any possible light reflections, as well as to improve the contrast, all lenses are covered with a full multi-layer coating.

The excellent optical system is hidden in a precisely made metal housing, which guarantees resistance to accidental damage and maintaining the alignment even when loaded with a heavy camera or SLR.

The most important features of the Sharpstar RC2508 reducer (0.8x)

• professional three-element focal length reducer dedicated to optical tubes of the Ritchey - Chrétien system
• optics covered with full multilayer coating
• Standard 55mm back focus using the M48 adapter

Technical specifications

• optical system: triplet with an air gap
• anti-reflective coating: full multi-layer coating (FMC)
• compatible telescopes: Ritchey - Chrétien (RC)
• compatible apertures: 200 - 800 mm
• compatible lenses: f / 6 - f / 9
• reducer multiplicity: 0.8x
• back focus: 55 mm (from the end of the thread M48x0.75)
• thread on the camera side: M74x1 / M48x0.75
• thread on the side of the telescope: M78x1
• length (without M48 adapter): 60.5 mm
• diameter: 95/74 mm

Elements of the set

• Sharpstar RC2508 reducer (0.8x)
• M74x1 / M48x0.75 adapter

guarantee

24 months