Yesterday I finaly had a good view of the red planet. I was surpriced with the amount of detail and asked the question: "why I haven't see more when Mars was almost twice the diameter?".
The norht polarcap was very small and difficult to see compared with my last observation a month ago (a blue filter helped). The best view was with a yellow filter: Mare Eryhtraeum was most prominent. Mare Acidalium/Niliacus Lacus made a sharp distinction with the lighter Tempe. At the west (middle left) was another lighter region (Eden?).
The sketch was done with pastel pencils and a new toy that worked very well for blending: a rubber shaper . The black surrounding was done with a black permanent marker.
15/4/2010, 21.40 UT, 12" dobson + apodizing mask @ x300, yellow and blue filter, CM 35°, diam. 8.2", alt. 45°