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Sigma 135-400 MM f/4.5-5.6 ASP AF APO

Review Date: Jan 22, 2006 Recommend? yes | Price paid: Not Indicated | Rating: 7 

Pros: Very solid build for the price range, rather sharp when used on a monopod, fairly cheap yet not cheap and plastic feeling...
Backfocus at less than 250mm when near wide (like many Sigma lenses..

If you are looking for something better than your run of the mill 70-300/4-5.6 zooms, but cant afford a $1000+ lens then this is a good balance... It does extend a lot when zoomed, but the barrel is solid and has no freeplay... Mine has very little if any zoom creep (very stiff zoom ring).. On my *ist DS it does tend to backfocus a little when wide open and at its wider end (like some other Sigma zooms). I can live with it, as I use it mainly from 250-400mm where strangely enough it seems to be at its best...

I do suggest using a monopod as it is not a light lens, and you will get a much better sharp photo hit rate...