WFC3 Instrument Handbook for Cycle 24 . ... Wide Field Camera 3 Instrument Handbook for Cycle 24 > Chapter 1: Introduction to WFC3 > 1.3 Key Features of WFC3 . ... Key Features of WFC3 . The optical design of WFC3 features two independent channels, one sensitive at ultraviolet (UV) and optical wavelengths, approximately 200 to 1000 nm (the UVIS channel ), and the other sensitive at near-infrared (near-IR) wavelengths, approximately 800 to 1700 nm (the IR channel ). ...