I have 2 very nice Vivitar (made in Japan) lenses for Olympus OM cameras for sale:
200/3.5 - Fast 200mm telephoto. Excellent ++ condition. 62mm filter size. Built in metal lens hood, rear cap.
28/2.5 - Fast wide angle lens. Excellent glass, mechanics. Very good cosmetically (very minor wear on focus ring, lettering). 67mm filter size. Front/rear caps
These are both great for piggyback astrophotos. The 28/2.5 is also good for meteor and aurora.
Asking: $75 + shipping for both. Or $40 each + shipping