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Optical performance

The Taurus and LDSS focal reducers, and to a lesser extent the two prime focus correctors, contain a large number of glass elements which limit the efficiency outside the wavelength range for which the optics, and particularly the anti-reflection coatings are optimised. For this reason imaging in U and I with Taurus and especially LDSS is not recommended. The Cassegrain auxiliary port of the WHT, and the JKT direct CCD camera, provide the most efficient options for U band imaging.

Tue Aug 15 16:42:46 BST 1995