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Sigma 70-200 mm f : 2,8 II DG APO EX HSM Nikon
awesome lens never to be regretted - around $800, but the equiv Nikon is $2k+.
AF is lightening quick.
Only prob is, at f4 or less, autofocus isn't perfect, not bad at all, but not perfect. However, at those wide apertures, in manual focus mode it's awesome at f2.8 - perfect for low light conditions.
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For coding work - hit me up on andy // borkedcoder // com
(consider figuring out the email as test #1)
All models are wrong, but some are useful. George E.P. Box. p202
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