Okay...I am going to rent a 400mm F5.6, thinking I can replace my Sigma 150-500mm...
But the 400mm 5.6 has no image stabilization and I use my lenses to shoot wildlife and bird photos. In the past I had a 300mm with IS and had a 1.4 TC to make it 420. I have a 40D body.
So I tested a non- IS on my sigma by turning it off. Not good...perhaps one in 5 shots will be workable and not blurred. Is that normal when working without image stabilzation? If so, it is certainly not worth the investment in any long range lens without IS. I experimented on a mono-pod. With IS, all pictures turned out fair clear, or at least not blurred. Without it, terrible results. now, this was taken from inside looking out the window with ISO at either 800 or 100... exposure + 1 stop or more, shutter speed was 1/15 ....real slow I must admit but a cloudy NW day.
Taking shots of a quail so it has lots of detail and easy to pick out. Even when just sitting, no movement...1/5...with movement, I am lucky to get even that 1? What am I doing wrong> jim


