Is that a macro lens? I've been tempted to get the 40mm 2.8 macro lens made by Nikon lately.
not really, it's a tele lens with kiiind of option for macro but the min distance is 50cm from the subject. I am finding it great for animals, just took a few shots in the park today.
Here's a very good review of the lens, more or less what sold it to me:
http://robinwong.blogspot.co.uk/2014/10/olympus-mzuiko-40-150mm-f28-pro-lens.html