06-02-2010, 06:43 PM
Sorry, no experience myself. However, the usual advice: carefully test it, if possible. Even the expensive Sigma lenses are not free of sample variation (as I had to learn with the 120-300, which had been my last Sigma lens for quite a while ...).
In addition, be prepared for rather thin DOF with such a long lens, even when stopped down to f/8.
-- Markus
In addition, be prepared for rather thin DOF with such a long lens, even when stopped down to f/8.
-- Markus
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