I'm a keen motorsport photographer, albeit a newish one. Having to buy the camera meant that at the time I didn't have much cash left over for lenses, although I've got a bit more cash available now and was considering improving on my "budget" gear. However, I don't know what would make the most difference.
Here is my current gear.
18-55mm f/3.5-5.6G AF-S DX
55-200mm f/4.5-5.6G AF-S DX VR
70-300mm f/4-5.6G AF (manual focus only with D40)
I can't make my mind up what I should be going for. Should I go for a prime fixed focal length or a decent zoom, or a zoom with a teleconverter, etc. etc.
I hear the ED glass is very nice. In some ways I wish there were fewer choices so that it would make the decision easier. So really, I'm looking for any suggestions that anyone might have. I've got a monopod so stabilising isn't essential but would be nice. Also would like the lens to have a SWM motor so that I can use the autofocus.
Would appreciate any advice or words of wisdom.