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I got this lens instead of the kit(after reading lots of posts).Many described intermittent focus issues.They were right.Above 70mm this lens hunted and hunted and hunted some more.At least 25% of the shots showed visible focus problems.I've used slrs for 30+ years,so it's not operator error.I compared it to my neighbors kit lens and the kit was sharper and focused well.Then I compared it to Canon's 28-105f3.5.HUGE difference!And the canon cost less.So I now have the Canon kit and 28-105 to replace the sigma.It's nice to get properly focused images.The Sigma has an inexcusable flaw with this focus issue.
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