The Pentax Q-S1 is a compact digital mirrorless interchangeable lens camera announced by Ricoh under the Pentax brand on August 4, 2014. It replaces the Pentax Q7, and is part of Pentax' Q system, the most compact digital interchangeable lens camera system as of September 2014, with crop factors ranging from 4.6 (Q7, Q-S1) to 5.6 (Q, Q10).
The Q-S1 has in-body image stabilization as well as a built in flash. It is available in a variety of color combinations. In video mode it can auto focus while shooting with the 01, 02 and 08 lenses.
Discontinued as of January, 2020.
See also List of Pentax products List of smallest mirrorless cameras
References http://www.dpreview.com/products/pentax/slrs/pentax_qs1/specifications