An athermalized objective has been designed for a compact, lightweight push-broom camera which is under development at El-Op Ltd. for use in small remote-sensing satellites. The high performance objective has a fixed focus setting, but maintains focus passively over the full range of temperatures encountered in small satellites. The lens is an F/5.0, 320 mm focal length Tessar type, operating over the range 0.5 - 0.9 $mu@m. It has a 16$DGR field of view and accommodates various state-of-the-art silicon detector arrays. The design and performance of the objective is described in this paper.
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