Back-end of VISTA, with the VIRCAM at Cassegrain focus. The rear of the cryostat is seen (black), with the filter wheel bulge at the far side. The five red electronics boxes are mounted on the cryostat. The camera coolers and cryo-pumps are mostly hidden behind the electronics boxes. The large annular structure surrounding the camera is the Cassegrain cable-wrap; fixed sections of Helium hoses are seen curving around the back of the M1 Cell, and enter the cable-wrap at the connector box at lower right.
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