How good do you think the IS is at 600mm? It doesn't seem like 4 stops to me.
how do you calculate that it is not 4 stops?
you shoot handheld with and without VC and look how many stops you need to see no blur from your tremors?
or you just say you should be able to handhold it at ~1/30s. @600mm.
It is claimed in this review that 50% of his shots at 1/40 s are sharp. Most of mine are blurred at that speed.
well that doesn´t mean it has to be the lens or VC.
exactly what i meant.
are you able to hold a different (canon) 600mm lens at that speed?
i know people who can handle 600mm with IS at 1/30s or 1/40s but im not one of them.
as im not one of the guys who can shoot a 600mm handheld without IS at 1/600s.
you can´t just say "the rule is 1/focal length and this is a 4 stop VC so i should be able to hold it at 1/40s". that´s taking YOU out of the equation.
when you look at professionell bird photographer most of them use a tripod or at least a monopod.
for a good reason.
next thing i will buy is a gimbal.
Here is a recent quote from Art Morris, one of the most famous professionals of all time:
"2) The Sharp, Fast, Versatile 300mm ƒ/2.8
For years I had my eyes and my mind closed to the 300mm ƒ/2.8 lenses. That all changed when I borrowed one for my big Antarctica trip with Cheesemans' Ecology Safaris in early 2012. I loved it so much that I extended the loan and brought it along to Japan for a month. On the Southern Oceans trip, I needed to travel light; the Canon 300mm ƒ/2.8L IS lens was my big lens. It was great in the Zodiacs® and great for handheld birds-in-flight
photography with or without the 1.4x TC. I used it with the 1.4x TC for all of my sea eagle flight photography in Hokkaido, and it was great for the snow monkeys as well. Aside from the light-gathering ƒ/2.8 speed, the lens is mind-bogglingly sharp.
Canon EOS-1D Mark IV, EF 300mm ƒ/2.8L IS USM, Extender EF 1.4x III, handheld
Professionals use tripods or hand hold according to circumstances. The 400/5.6 was (and still ) is so popular because hand holding is necessary for much bird in flight photography. Now, we can use the Tammy or 300/2.8 - we are so lucky.