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WFC3 (for Wide Field Camera 3) is the current general-purpose camera on the Hubble Space Telescope (HST), installed in 2009 to replace the earlier WFPC2. It covers visible light and some nearby ultraviolet (UV) and infrared (IR). Its field of view is 2.7×2.7 arcminutes for visible and UV, sensing with 4096×4096 CCD pixels, and a bit smaller for IR, with 1024×1024 (larger) pixels. It offers ~70 filters with varying bandwidths, and offers three grisms, G280, G102, and G141 for slitless spectrography.