Thread: Viewing Mars
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Old 03-05-2014, 02:38 AM
Renato1 (Renato)
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Join Date: Mar 2014
Location: Frankston South
Posts: 1,283
I use a red No. 23A filter on smaller telescopes and red No. 25 filter on larger telescopes to make the polar ice cap stand out. If you don't have them, you can try to improvise with any orangey sunglasses you may have, or that red translucent plastic gift wrapping stuff that you can find around the place.
Cheers,
Renato
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