Pentax smc DA 50-135mm F2.8 ED [IF] SDM review
smc PENTAX-DA ? 16-50mm F2.8 ED AL[IF] SDM With ultra-to medium-telephoto
coverage, this versatile lens can be used in a wide variety of applications
including landscape, snapshots and portraits. The tightly sealed,
weather-resistant and dust-resistant construction enhances durability for
use in both rainy and dusty conditions, making it a perfect companion for
the weather-resistant PENTAX DSLR bodies. The SDM focus system incorporated
in this lens results in a smoother, quieter autofocus operation using a
built-in supersonic motor. Aspherical elements, extra low dispersion glass
and PENTAX original lens coatings make this lens superior in contrast,
clarity and edge-to edge sharpness.