Hi there globular, thanks for your comments. If the atmosphere is steady you could easily use 300x on Mars with an 8 inch scope, however, good seeing is essential for planetary observation. The lower magnification views will always produce a sharper image, but Mars is still relatively small compared to the gas giants, and as you say can seem too bright. Try using a orange/red filter this will dim the image and make dark features a bit easier to see. However, patience as they say is a virtue, and you may have to observe for several hours and get your eye in just to get a few glimpses of the often subtle surface features. Mars is generally not an easy planet to observe, but well worth the effort, especially during this favourable apparition for northern latitudes. Good luck. Chris.