Up for sale a Istar R30 180mm F8 objective in cell .
R30 means it has about the same CA as a F11 lens
I built a rough housing for this that is a folded 2 mirror design and found the I could get a sharp focus but out of focus showed a couple of lines running through the diffraction rings .
No fungus or scratches .
I'm selling it as is for $850 plus post which is less than a third of what it would cost to get a new one from the USA .
