[YMFB]

Some years ago I got into photography but what with bikes, marriage, kids, cricket etc etc, it fell of the end of my hobby list. A few weeks ago we bought a Canon EOS 400 mainly because I had a stack of kit from my 35mm EOS.

I would like to get back into it, just as a hobby photographing bikes, parked and racing, particuarly IOM TT.

I have a zoom lense with the following:

Ø 55 Sigma Zoom AF-λ
1:4.5 ~5.6
F = 75 - 300

My thinking was to get something longer and have looked on line at a SIGMA 170-500mm f/5-6.3 APO (CANON AF) but as its over £500, I need to be sure its going to be what I want and its going to be much better than the old one.

Any assistance or guidance would be appreciated.