Welcome to K -corrections calculator, simple service allowing one to determine K -corrections of a galaxy, given its redshift and one or more colours. ... Please note that galaxy redshift should stay in the range between 0.0 and 0.5. ... K -correction in choose filter.. AB mag --- SDSS u SDSS g SDSS r SDSS i SDSS z UKIDSS Y UKIDSS J UKIDSS H UKIDSS K --- Vega mag --- Johnson U Johnson B Johnson V Cousins Rc Cousins Ic 2MASS J 2MASS H 2MASS Ks . Redshift . Colour choose colour.. ...