So should we really believe Scott Kelby? The discussion about the need for tripods goes on. There are pros and cons, and I can only give my opinion, which is that it depends on your aims and shooting profile.
As you can see, for the time being I have attached my markins q3 emille to the Manfrotto 694CX Carbon Monopod. I also have a manfrotto tripod, but it’s a bit clumsy to carry that arond, set it up and put it all back again. For me, tripod work is only when I shoot some specific things, in specific situations. The monopod is however very handy and can be carried around.
The thing is, I walk around and shoot whatever I think could make an interesting picture. Sometimes I may be walking for a couple of hours and take hundreds of pictures. A tripod doesn’t blend in very well with that style. I guess that what I do is not exactly professional, but then, I’m not. With this method I do manage to take some shots I like and that’s all that counts.
I find that the Canon EF 70-200L IS f/4 often works very well hand-held. It has excellent image stabilaztion and on the EOS 7D it’s very balanced. At 200 you would normally want a shutter speed of 1/320 (crop-magnification factor), but count that 1/100 is usually fine. With the f/4 you don’t need superbright light in most circumstances.
The Sigma 150-500mm F5-6.3 APO DG OS HSM is another story. It’s heavy for me, and I really need some support. The monopod, or a tree, or a lamp post. With the weight and the stabilizer I guess the problem isn’t really camera shake if you have enough light. Generally 1/250 should be fine (500×1.6/4). During daytime, with ISO 200, that’s not at all impossible. My problem is to really aim well with such a long tele, the weight doesn’t allow me to calmly compose my picture if I don’t get some help.
For additional discussions you might also like: http://www.digital-photography-school.com