Since the lunar spin axis is only tilted 1.5 degrees, the #Moon barely has seasons. The poles are in a perpetual state of dawn to dusk, with the Sun always on the horizon.
As a result, depressions near the poles never receive direct solar illumination, areas known as permanently shadowed regions or #PSRs.
LROC has imaged nearly all of the Moon at meter scale, except within PSRs. The LROC Narrow Angle Camera design was modified so that #ShadowCam is 200x more sensitive than the NAC to image within PSRs, taking advantage of light dimly reflected from nearby topography.
For film photography, this would be the equivalent of increasing from ISO 100 to greater than 12,800 without increasing grain.
http://shadowcam.sese.asu.edu/images/1284