Keywords: Schmidt telescope (PSF).svg Schmidt_telescope_ PSF png 2011-04-22 10 50 UTC Schmidt_telescope_ PSF png Pearson Scott Foresman derivative work Malyszkz <span class signature-talk >talk</span> Zwektoryzowano Krzysztof Zajączkowski malyszkz Schmidt_telescope_ PSF png PD-ScottForesman Original upload log This image is a derivative work of the following images File Schmidt_telescope_ PSF png licensed with PD-ScottForesman 2007-12-09T21 49 06Z PatríciaR 2086x2284 144142 Bytes <nowiki> Line art of Schmidt telescope PSF S-810011 png other versions Line art Telescope diagrams Lenses</nowiki> Uploaded with derivativeFX Pearson Scott Foresman publisher Reflecting telescope diagrams Schmidt cameras |