What Sigma

<p>I am at the moment using a Sigma 170-500mm f5-6.3 APO DG lens on a Canon 1000d could anyone recommend a better Sigma lens for Bird photography.</p>

<p>I had a 150-500mm for a while. It went back to the store because the OS didn't work, the AF didn't work and it wasn't sharp. If you got lucky and got a better one it might be good for bird photography. The OS is useful, and the HSM focusing is fast and quiet.</p>

<p>Also I believe there is a new 50-500mm which has OS/HSM. It may be worth looking for a review of that.</p>

<p>I have to say, though, that my overall experience of Sigma lenses has been quite disappointing. I know a lot of people say that, and we're all talking about very small sample sizes - but I think I would be happier with a used Canon lens if you could find a nice one and the price difference wasn't too horrendous - for example, Canon's 100-400 zoom seems to have a good reputation.</p>

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<p>Thanks Steve however its the 170-500mm I use and as I can not use a 1.4 converter with it the reach just is not enough at times and the IQ can be quite soft so perhaps its time to save :D</p>

<p>John</p>