Sigma 70-200mm f/2.8 II EX DG APO Macro HSM Autofocus Lens for Pentax K-Mount Review

The Sigma 70-200mm f/2.8 II EX DG APO Macro HSM is a telephoto zoom designed for Pentax K-mount cameras, offering a constant f/2.8 aperture across its range and macro capability. At $411 on the used market in excellent condition, it sits in the mid-tier telephoto category for Pentax shooters looking for reach and shallow depth of field without the first-party price tag. This older EX DG generation predates Sigma's later Art and Contemporary lines, but it includes APO elements to reduce chromatic aberration and HSM for relatively quiet autofocus. The macro designation allows closer focus than typical telephotos, adding versatility for detail work. Pentax K-mount users have fewer third-party telephoto options than Canon or Nikon shooters, making this lens relevant for budget-conscious photographers who need a fast telephoto for portraits, sports, or wildlife on a crop or full-frame Pentax body.