Venus Laowa 100mm f/2.8 2x Ultra Macro APO Lens for Pentax K

100mm f/2.8 2x Ultra Macro APO Lens

The Venus Laowa 100mm f/2.8 2x Ultra Macro APO Lens is a manual-aperture prime designed for Pentax K-mount cameras. It covers full-frame sensors and delivers 2:1 magnification, allowing photographers to capture subjects at twice life-size. The apochromatic optical design minimises chromatic aberration across the frame. This lens suits macro specialists who need greater-than-life-size reproduction without accessories.

Manual focus with 9.72" minimum distance

Focusing is entirely manual, giving the photographer direct tactile control over the focus plane. The closest focusing distance is 9.72 inches, which is the working distance required to reach the maximum 2:1 magnification. At this distance depth of field becomes extremely shallow, demanding precise adjustments and often a tripod or focus rail. The manual aperture ring allows exposure control without electronic coupling to the camera body.

2:1 magnification exceeds standard macro

Most macro lenses stop at 1:1 life-size reproduction; this optic reaches 2:1, revealing detail that a standard macro cannot resolve. That extra magnification is the single specification that determines whether the lens matches the intended subject scale. Photographers who only need 1:1 will find simpler, often lighter alternatives, while those who require the 2:1 capability gain it natively without extension tubes or close-up filters.