Venus imaging

On second of February 2009 I had my C8 OTA collimated and ready for planet imaging. Venus was already too low on the sky, but I still was able to take an acceptable image. Below is one captured frame from video, showing clearly disturbances in the image.
Below is result of 219 stacked frames. Next time I need to do imaging, when Venus is higher on the sky. Focusing must be done more carefully, Bahtinov mask could help...
Additional information:
Date: 2.2.2009
Time: 20:17 (GMT+2)
Location: Karakallio, Espoo, Finland
Telescope: Celestron C8
Web camera: Philips SPC 900NC
Barlow: TeleVue 3x