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Sigma APO 100-300mm f/4 EX DG HSM  lens. Review: Sigma 100-300mm f/4 EX DG HSM APO
By Andrew Alexander, The Imaging Resource
(Monday, November 22, 2010 - 23:07 EST)

Updated in 2005, the Sigma APO 100-300mm f/4 EX DG HSM telephoto zoom lens provides a constant relatively fast f/4 aperture in a compact and portable platform. The lens is one of the oldest in Sigma's current catalog, but is relatively unchallenged in its niche when one looks at the offerings from other manufacturers. We've put this lens through its paces in our test lab: click here to read our full review of the Sigma 100-300mm f/4 EX DG HSM APO lens.

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