# What is mast camera? And what does it do?

The mast camera is on curiosity but I don't really know what its about . it is know that it's official on curiosity but I don't know what it's used for.

There are more details on the Mastcams on the specific page at MSSS but basically there is a short focal length (34mm) Mastcam, giving a wider field of view (15$$^\circ$$), and a longer 100m focal length Mastcam for more close-up images (5.1$$^\circ$$ field of view). Both are equipped with several filters in the visible and near-infrared part of the spectrum (the filters span 440 to 1035nm) to allow the mineralogy of rocks and the terrain to be determined but also to allow natural color images to be taken. In addition both Mastcams are capable of 720p video (at 10 frames/second) and in theory can be used for making 3d stereo pairs (although this is apparently not often used due to the different focal lengths and fields of view of the 2 cameras).