mish wrote:The trick is the focal length, as I do need to span the range from 28 to 300.
It's certainly important, but truly, it's only a part of the equation.
The fact that you're using a 40D is significant; it's a good body, with reasonable high ISO performance and resolution, and it's also a 1.6 crop body, which has a direct effect on how your glass will render the images on the camera's sensor.
With the crop sensor and good resolution, if your images are correctly exposed, then you can deal with reach by cropping.
I know that faster is better, but I would prefer not to be swapping lenses in the dark 6 times per gig.
Changing lenses in the dark isn't an issue; I do it all the time. And looking at Cameron's suggestion, you might find it cheaper and more expedient to use two bodies each with a different lens fitted, if you're concerned about this.
I think I'll keep researching a bit longer.
That's a good idea, and that's also why we're here. We want to help you, and to be a part of that research process, but we want to do so in a neutral way: we have no interest in selling you .... stuff ... but only in helping you get the right gear to suit your needs.
Since my original post, Kirks Camera store in ringwood have offered to let come in me play with it in store on my camera.
Pardon my sarcasm here, but how very bloody noice of them.
In all honesty, that is exactly what their job is, and any store should be thrilled to let you try just about any lens on any body that you wish. I would walk out of any store that didn't want to let me do that; there's plenty around who will.
Looking at your images, there's nothing major in terms of being left wanting, that I am seeing.
I'd probably stay well away from AWB though - a couple of these images look a tad under-exposed and perhaps have AWB enabled. Stage lighting is always a problem and will cause you major headaches; far better to just let the staged lights give you what they can.
And switch to spot metering if you're not already using it; set your EV compensation to about -1.3, AV
mode, meter of something brightly lit, and you should be good to go.