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PANIC is a wide-field NIR camera, which is currently under development forthe Calar Alto observatory (CAHA) in Spain. It uses a mosaic of four Hawaii-2RGdetectors and covers the spectral range from 0.8-2.5 micron(z to K-band). Thefield-of-view is 30x30 arcmin. This instrument can be used at the 2.2mtelescope (0.45arcsec/pixel, 0.5x0.5 degree FOV) and at the 3.5m telescope(0.23arcsec/pixel, 0.25x0.25 degree FOV). The operating temperature is about77K, achieved by liquid Nitrogen cooling. The cryogenic optics has three flatfolding mirrors with diameters up to 282 mm and nine lenses with diametersbetween 130 mm and 255 mm. A compact filter unit can carry up to 19 filtersdistributed over four filter wheels. Narrow band (1%) filters can be used. Theinstrument has a diameter of 1.1 m and it is about 1 m long. The weight limitof 400 kg at the 2.2m telescope requires a light-weight cryostat design. Thealuminium vacuum vessel and radiation shield have wall thicknesses of only 6 mmand 3 mm respectively.

PANIC: the new panoramic NIR camera for Calar Alto