Even with DSLRs declining in popularity and prominence, development of new lenses continues for these tried and true cameras. While production has slowed in the last few years, optics manufacturers are still working on putting out new glass to make the most of updated sensor designs and pushing the boundaries of how well a lens can perform, how compact and lightweight a lens can be, and filling in the gaps of desired focal lengths.
Pentax
Perhaps the most notable of DSLR stalwarts, Pentax continues to champion the history, reliability, and familiarity of a DSLR. In 2019, this company released a trio of K-mount lenses—all wide-angles—including two refreshes and one wholly new design. Looking at the most unique first, the HD Pentax DA* 11-18mm f/2.8 ED DC AW is a 17-27.5mm-equivalent zoom designed specifically for the APS-C-format cameras. The useful wide-angle range is complemented by an f/2.8 constant maximum aperture, along with an optical design that uses a slew of aspherical and extra-low dispersion elements to produce well-corrected imagery. Aero Bright II and Super Protect Coatings are also present, along with a DC motor for quick and precise AF performance. Also unique, and making this lens especially interesting for nighttime/astro photographers, is a dedicated groove for wrapping an optional heating device around the lens to prevent freezing or condensation when working in cold temperatures.
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