Mars is about twice the distance from the Sun as the Earth, as a result the anguar size of Mars varies considerably depending on the relative positions of Mars and Earth in their orbits around the Sun.
Through a small telescope you should be able to see Mars as a disk, the polar caps should also be visible and on nights with good seeing you shoudl be able to see some features on the surface.
Light Yellow (Wratten #3) Improves contract of albedo features on the surface.
Yellow-Green (Wratten #11) Good for reddish-brown surface features.
Red (Wratten #25A) Improve contrast of polar caps.
Dark Blue (Wratten 38A) Good for white clouds.
Medium Blue (Wratten 80A) Good for white clouds.
Lucky imaging using a digital sensor will provide the best results, a monochrome sensor will reduce your exposure time and help freeze the seeing. A red or IR Pass filter will help freeze seeing but at the expense of longer exposures.
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