Followed by the success of the Laowa 60mm f/2.8 2:1 Macro, the 100mm f/2.8 2:1 Macro is the 2nd member of Laowa 2:1 macro line-up. This new 100mm lens can cover full frame sensor and focus from 2:1 magnification to infinity. 100mm is a more popular focal length for macro photographers. However, all of the current 100mm macro lenses in the market can only achieve 1:1 (life-size) or even smaller magnification. Shooting with smaller bugs is usually a challenge for macro photographers. The wider magnification range of the new Laowa Macro allows photographers to capture subjects at any size, making it one of the most versatile macro lens in the market. Despite having the wider range, Venus Optics manage to compress the size of the lens to the minimal and it is similar to other 1:1 macro lens in the market. Laowa 100mm 2:1 Macro lens also features an apochromatic (APO) characteristic that chromatic aberration is invisible. Chromatic aberration (CA) is one of the most challenging topic for optics designer as it can usually ruin a perfect image. Some of the macro lenses in the market controls the chromatic aberration at the "in-focus" area really well but the CA is uncontrollable in "out-of-focus" rendition. The Laowa 100mm, however, delivers an exceptional performance on chromatic aberration suppression, both at the "in-focus" area as well as "out-of-focus" area. The subject in the image will not be polluted of any unwanted color fringing. Not only it is an exceptional macro lens, the Laowa 100mm f/2.8 is also a very decent portrait lens when focus to infinity. The 12 elements in 10 groups optics design delivers a crystal sharpness image in both macro and infinity distances. The bright f/2.8 and circular aperture renders softly diffused bokeh and isolates the subject from its background. The lens has an internal focusing structure that will not extend when focus is changed. A multilayer coating has also been applied to reduce lens flare and ghosting for increased contrast. If you are looking to use the lens on Sony FE camera via adapter, make sure an electronics adapter is being used or else your aperture cannot be adjusted.Lens Elements / Groups12 Elements / 10 GroupsDiaphragm Blades13Dimensions2.83 x 6.10" (72 x 155mm)Weight22.5Oz / 638g