Another annoying which lens before I make my mind

[P-Chan]

Sorry for annoying repetative questions. My apology but I really dont know were else to turn my head to.

I checked other brands of lenses then just the canon ones. And I found this which looks nice but I dont know if its what i really am looking for. Its a Sigma lens.

Budget wise is all I can afford.

Reasons I want this lens. Wildlife, flying birds, moving objects. Alos good for stationary objects but thats secondary.



My original chioce of preference

http://www.amazon.co.uk/Canon-75-30...6?ie=UTF8&s=electronics&qid=1258926621&sr=8-6

USM is helpful for moving birds. No IS is a back side but not helpful for birds. Not sure about fully zoomed how clear the pic



vs



Is this a Macro and Full Zoom all in 1 lens? Am i getting it right? I would love Macro as long as I can alos use it to zoom on flying birds . Back side i do not know what the letters and statistics of this one say but if Im getting it right (with your help) Im going for this one

http://www.amazon.co.uk/Sigma-70-300mm-f4-5-6-Macro-Canon/dp/B000ALLMI8/ref=cm_cmu_pg__header



Always either or have to be compatible with Canon 500D EOS

 

[RKC]

http://www.sigma-imaging-uk.com/support/abbriviations.htm
tells you what the abbreviations mean

personally would go for the canon ok no IS but has USM,

 

[coldpenguin]

IS isn't useful for actually capturing images of the birds whilst in-flight, but it can make trying to keep them in the viewfinder a bit more pleasant.