Exactly, at 100 oz it is actually less than the 500 f/4 II, 600 f/4 II, and Sigma 120-300 f/2.8. It is about the same as the 300 f/2.8 plus 2x TC. Then you have another cluster in weights from 55-67 oz with the 100-400L plus TC, 400 f/5.6 plus TC, or the Tamron 150-600.Originally Posted by neuroanatomist
At 3 lbs lighter than my 600/4L IS II, it's not that heavy...
If the optics and AF are even close to the other lenses in this weight class, this is a heckuva lens. I would definitely consider it. Along with my budget and other options.
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