Originally posted by Dangermouse Thanks Jim - these lenses seem to attract some mad prices so knowing what to look for should help me pick up a good one for sensible money. I'll probably be looking later in the month or early next month.
The M-135 doesn't tend to be too expensive (in North America at least); I'd guess about $45 would get you one.
As for the lens hood, it kinda slides out but mine doesn't stay. It's pretty much useless from what I can tell. The main issues with flare are on a digital sensor when shooting towards a bright light source.
For most shooting a hood is not necessary IMHO.