Tamron 18-250?

[markmullen]

I currently have a 450d and 18-55 (non IS) and 55-250 IS lenses.

I can get a Tamron 18-250 for £225 which seems a good price and would cut down on lens changes when I am in dusty places, the thought being to use it as my general walkabout lens.

I don't really have a style of photos I stick to, I do some landscapes, some motorsport, some photos of family events etc

I would then probably get a 50mm 1.8 for low light stuff and am thinking about a longer zoom for motorsports (possibly the 100-400 or a long Sigma).

Would swapping the 18-55 and 55-250 for the Tamron 18-250 be a good move?

[rasputin]

Not much point in having a 50mm lens, a 100-400mm lens, and a lens that duplicates 50mm and 100-250mm.

If you want to cover that range...
Get a decent kit lens replacement with constant f/2.8 (ie. Tamron 17-50mm), an 85mm f/1.8, and your choice of big zoom.

[Simpo Two]

f6.3 at the long end is going to leave you, and the AF system, struggling in low light.