Rowe-Ackermann

Celestron CGEM II 8in Rowe-Ackermann Schmidt Astrograph

Celestron CGX 11 Inch Rowe-Ackermann Schmidt Astrograph Optical Design: Rowe-Ackermann Schmidt Astrograph Aperture: 279mm (11") Focal Length: 620mm (24.4") Focal Ratio: f/2.2 Central obstruction diameter: 114mm (4.48") (41% of aperture...

Celestron CGX 8 Inch Rowe-Ackermann Schmidt Astrograph Flat-field free of optical aberrations like field curvature, coma, astigmatism and chromatic aberration across an entire APS-C sensor. Unlike the larger RASAs that work with DSLR and large CCD...