From pistol rounds to artillery shells, the Army is developing a host of new ways to destroy targets large and small.

Distortion measures – 1.98% barrel, which is pretty good for a 20mm lens. Further correction is possible in-camera or in software, but for most subjects, this would not be an issue. Bokeh ...

(From Pentax lens literature) The Pentax SMC P-FA 20mm f/2.8 lens offers outstanding versatility and is perfectly suited for architectural and outdoor photography. Weighing a mere 9 ounces ...

只要 899 的超广角镜头唯卓仕 20mm F2.8 也来和尼康用户交朋友了！ 外观上突出一个小，重量仅 173g，比部分手机还要轻。镜身为塑料材质，略带磨砂手感，不易留指纹。 小巧的代价就是，很难塞 ...