YuengLinger said:
How often do you use IS on your Big White(s)? From what I understand, the 300mm and 500mm models are the only ones close to practical for hand-held use.
Doesn't IS deactivate when a tripod is used?
What about a monopod?
Thanks!
I use IS pretty much at all times short of a long exposure on my 300 f/2.8L IS II as I do 90% of my shooting in the 90 minutes just before and after sunrise or sunset.. I use mode 1 for landscape and stationary shooting, mode 2 for panning shots, and mode 3 for sports & wildlife. It is really amazing, especially with the 2x extender. I have taken shots like the one below at 1/30s handheld at 600mm in falling light. That would be almost impossible without IS short of being a trained sniper

. I came from the 400 f/5.6, which required extreme discipline in terms of tripod use, so the IS in this lens, is a revelation.
IS does deactivate for tripod use, during a certain range of shutter speeds, something like 1/100s to 1/2s, but I can't remember the exact range. Any slower than that and Canon still recommends your turn it off manually.
There are some on here who say that IS affects the quality of their photos at typical sports shutter speeds of 1/1000s+ and that is true with the older big whites. It's why Canon add mode 3 to the newer lenses and I haven't found any issue with leaving mode 3 on, even at 1/4000s or higher.
Also, I feel that monopods compliment IS. For sports shots where you're stationary and don't want to hold the camera, it's great, plus in mode 2, it makes for some great panning shots. I also found that the 800 f/5.6 and a monopod are a match made in heaven because of IS. Mobility with such a huge lens is tough, but with IS, it's doable on a monopod. Now if I could just scrape together the money for a 800mm...
It looks like Smugmug has oversharpened the web version, but the shot turned out acceptably sharp. Not razor sharp, but quite good for large prints. Shot a f/6.3, 1/30s, @ISO 1600: