The following tables have been taken partly from the original NIRC2 proposal by Keith Matthews and Tom Soifer, and partly from more recent information on the as-built instrument.
 
Input f/ ratio f/15
Wavelength range 0.9-5.3 microns
Field of view 10x10 arcsec (narrow camera)
20x20 arcsec (medium camera)
40x40 arcsec (wide camera)
Pixel scale 0.009942 arcsec/pixel (+/- 0.00005")
0.019829 arcsec/pixel
0.039686 arcsec/pixel
Filters z, Y, J, H, K, Ks, Kp, Lw, Lp, Ms, HeI, Pa_gamma, Jcont, Pa_beta, H_cont, CH4S, H2, Fe II, CH4L, Br_gamma, Kcont, CO, H2O, PAH, Br_alpha, Br_alpha_cont
Pupil mask 1 circular fixed, circumscribes the telescope pupil
1 circular rotating, inscribes the telescope pupil and masks the spiders
3 hexagonal, rotating
Slits 10, 20, 30, 40, 60, 80, 120, and 160 milliarcsec
Coronagraphic spots circular: 100, 150, 200, 300, 400, 600, 800, 1000, 1500, 2000 milliarcsec
Grisms lowres, medres
Minimum frame time 0.25 sec, full frame
Detector 1024x1024 InSb Aladdin-3 array, 27 micron pixels 
32 simultaneous outputs, grouped in 8 pixels across a row in each of 4 quadrants
subarray capability
35 K operating temperature
normal gain, 4 electrons/DN
Read noise 60 electrons per CDS read
15 electrons for MCDS with 16 reads
Dark current < 0.1 electrons/pixel/sec
QE 80% at 1.7 microns
Well depth ~18,000 DN at 5% linearity