Samir Kharusi feels that this lens competes well with modern APO refractors in 2007 for astrophotography - see
here, with better edge to edge performance although not quite as good contrast or image detail in the centre. Has enough aperture and magnification to provide good webcam images of Saturn using a 1.4x converter + a 5x TV Powermate although having some bluish flare decreasing detail and contrast.