| Abstract
| - We present observations of 11 quasars, selected in the range $z \approx 2.2$-4.1, obtained with ESA's Superconducting Tunnel Junction (STJ) camera on the WHT. Using a single template QSO spectrum, we show that we can determine the redshifts of these objects to about 1%. A follow-up spectroscopic observation of one QSO for which our best-fit redshift ( $z = 2.976$) differs significantly from the tentative literature value ( $z \approx 2.30$) confirms that the latter was incorrect.
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