Is Sigma's 300-600mm f/4 Your Ideal Super-Telephoto Lens?

The Sigma 300-600mm f/4 DG OS Sports Lens is filling a noticeable gap between typical telephoto zooms and ultra-expensive super telephoto primes. If you've been struggling to find a high-quality lens without reaching into the $10,000-plus range, Sigma's latest offering might be precisely what you're looking for.[ Read More ]