Originally Posted by Rob-F
The 150 balances better than the 180. And it is a stunningly sharp lens, even though it doesn't enjoy the mystique in the public mind of the 180.
The 150 looks about the same size and weight as the 50 FLE, so should balance well. I think the issue with the 180 isnít just the weight, but that it is very front heavy; thereís a huge chunk of glass in the front end.