NIRCam should be able to observe as faint as magnitude +29 with a 10000-second exposure (about 2.8 hours).[8] It makes these observations in light from 0.6 (600 nm) to 5 microns (5000 nm) wavelength.[2] It can observe in two fields of view, and either side can do imaging, or from the capabilities of the wave-front sensing equipment, spectroscopy.[9] The wavefront sensing is much finer than the thickness of an average human hair.[10] It must perform at an accuracy of at least 93 nanometers and in testing it has even achieved between 32 and 52 nm.[10] A human hair is thousands of nanometers across.[10]