Sounds like a dog of a lens to me. As soon as you get inside you will zoom in a bit and be at a f4 or f4.5 and be struggling for enough light. Or you activate your flash and have to deal with different color temps. OR you'll up the ISO and have to contend with a less than razor sharp image due to noise. I think that what these "super zooms" offer up is compromise at best, and these types of lenses limit what the novice or amateur photographer is able to do. I know, I used to be the guy that only had one lens and it was a f4-5.6, and as soon as I took it indoors I found myself having to compromise how my images were going to turn out. My humble opinion... If you are in the market for a zoom lens then examine the types of images that you most capture, I.E. wide, medium, or tight focal lengths, and then go out and get a f2.8 zoom that will work for you. I did it and I don't have an ince of regret. I can shoot in nearly any light condition and have a low enough ISO so that noise isn't an issue, even if I am forced to shoot a bit wide. I can always crop in. My 10 cents...