Mars is coming closer to opposition (first week of March). Its disc increased to over 12″, making it an easier astrophotography target. On the 4th of February, the seeing was pretty good. Visually, at 400x or so, Mars disc was quite stable and full of details. With a focal length of 7,000mm (using a barlow 2.5x), each pixel on the DMK 21AU618.AS covers about 0.15″. On the right you can compare with a simulation of Mars disc captured on Calsky.org.
Jean-Christophe Meriaux, Astrophotography in Urban Environment