try looking on Keh.com or ebay, you can find better deals on there than you can on NS half the time. Plus, the lens hasn't already been sprayed by snow 1,000,000 times.
i just picked up an opteka one (same lens under a different brand) off ebay for canon mount for 250 shipped with a mic, handle and cleaning kit. Just google the opteka ebay outlet and you'll find it, I thought that was a good deal as the lens alone retails for 300 i think
