Following the advent of 0.95x coma corrector for Newtonian reflector, SHARPSTAR optics has well received the favor of customers with high praise.A new 1x full-frame coma corrector is now available to meet the needs of different market segments. Optimized for the aberration correction, it adopts a new Quadruplet air-spaced design, which includes an extra-low dispersion lens, same as the 0.95x, it features 2" with 55mm focal length, which is very convenient and simple to connect your imaging equipment. Specifications Suitable model:150mm-600mm, paraboloid reflectorFocal ratio: F3-F6Magnification: 1.0xImage Circle: available scope of 44mmThe lens number: QuadrupletOuter diameter: φ50.8mm (2")Back focus: 55mm (Distance between the end face of the baffle ring and the focal plane)Overall Length: 118.7mmOptical Coatings: Fully multi-coatedWeight: 0.35kg