Sigma 580927

This is a great lens, a true 24-70 full frame equivalent. A great step up from the kit lens supplied with the canon and handy for low light.

1. It isn't the fastest at auto focus in very dim conditions compared to its more expensive Canon equivalents. 2. Not as sharp as a Canon L series equivalent but at a quarter of the price who's complaining.

Excellent value. Better than Canon's kit lens.

None.

internal focusing good for pol. filters build quality

non that I can think of