Ranger2 Mar 2006
"Rosehip mist" was intended as an alternative to 'rose-tinted glasses', and phrases of that ilk. My image of it was of a frost, then a light fog, very subtly red when seen under Mars (the man) but white like Venus in reality (which then served the purpose of stanza 2).
"Prism" was a play on 'prison', the planet being 'trapped' in a way within the telescope lens (the 'round glass eye' also being the man's longing for Venus).