|Tomorrow morning I should be the proud Daddy of a Canon 100-400 f4.5-5.6 L IS Lens and another specialty lens from Bhphoto.com. I have put this purchase off for a very long time, but I am finally in a situation where it justifies the cost.
Just off the shore here in Maui we have a bunch of Humpback Whales breeching (as in jumping out of the water) daily. There are a few different ways to get shots of them, either from the shoreline, hills, or even in a boat, but what it came down to was the Canon 70-200 2.8 IS L and even the Tamron 18-270 did not have enough reach. I also considered Sigma's 50-500 (AKA the "bigma") but have never regretted an L lens purchase and occasionally Sigma makes a bad copy, not ripping on them (I love sigma)- just want the best quality glass.
I also want to go down to Jaws where the HUGE waves are, back to Hookipa (Windsurfers) and it would also be my main lens if I ever go out shooting wildlife.
My thinking is this: Slap this bad boy on to Canon 7D orCanon EOS 60D and the maximum focal length jumps up to 640mm due to the 1.6x crop factor. Add a 2x Extender, and now we are in the 1280mm Range. If that's not going to get me close enough, I'm do not know what would.
One thing you will notice about this lens is that it doesn't zoom by ring manipulation, it's more of a sleeve that you manually push or pull, hence the nick name "push pull zoom". From what I understand it is a relatively HUGE lens, but the reviews on it at Bhphoto.com are stellar.
Looking forward to testing it out, getting some spectacular shots and letting you guys know what I think.