Canon officially announces the EF 400mm f/2.8L IS III & EF 600mm f/4L IS III. The worlds lightest lenses of their kind

Looking forward to the arrival of the 400 and the subsequent reviews. I'm in the market for this lens. If the weight is the only major difference with little to no difference in IQ, I'll snag version II. I don't mind the weight. I hand hold my 300 2.8 shooting basketball and volleyball all the time so a monopod on a 400 2.8 won't be a problem. $1,000 more for each pound of weight reduction is too much if that's the only difference.
 

Hector1970

EOS Rebel T7i
Mar 22, 2012
868
22
I've just spent over a week using a 600 f4 II partially hand held. It is doable but really quite heavy.
I'm not particularily strong but I could get a minute or two handheld and it worked very well.
20% off the weight would help.
The 100-400 II felt lightweight when I switched over.
I find the 300 F2.8 II very hand holdable.
 

tron

EOS 5DS R
Nov 8, 2011
3,702
102
The 300 2.8 II is indeed handholdable. But the 500 4L IS II could do with a significant weight reduction. At 3.2Kg it weighs more than the latest 600 (3.05Kg).