After finally deciding to take the plunge and buy this lens sigma went and discontinued it
. I had it ordered, but was sent the nikkon version even though pentax was clearly ordered and of course no more were available at that time. After waiting a month for one to become available money was returned. A few misses with ebay and the forum here... my timing seems a bit off I figure I would try posting here. I am looking for a newer version of the sigma 150-500mm in excellent condition. I would like to keep the price @ $600 or of course under. Willing to consider slightly higher for the right lens. If your lens is not being used all that often or you are looking to upgrade maybe we can help each other. Thank you all in advance.