Anyone knows the lens of Panasonic 45-150mm?

I am using the 45-150 on an Oly epl-1.  I have gotten really nice results as long as the light  is good. It is not fast, but pretty darned sharp.  Plus it is not much larger or heavier than my 14-45.  I have an OM-D coming Tuesday and look forward to trying the lens on it.  I think it is very good for the price and size.

Dave