Astonishing image resolving power and wide tonal reproduction GF45-100mmF4 R LM OIS WR consists of 16 elements in 12 groups, including three aspherical elements, one Super ED element and one ED element to effectively control spherical aberration, field curvature and chromatic aberration. This minimizes the negative effects of various forms of aberration, such as luminance shift and color bleeding, to deliver astonishing image sharpness Compact and lightweight Large Format standard zoom Weighing 2.2lb (1,005g), measuring 5.69in (144.5mm) long, and having a diameter of 3.66in (93mm), the lens is extremely portable and compact despite being a 2.2x zoom for a Large Format camera system. Fast, quiet and highly-accurate AF The use of an Internal Focusing system has reduced the size and weight of the focusing group, which is driven by a linear motor to achieve fast, quiet and highly accurate AF. Powerful image stabilization The lens is equipped with five stop image stabilization (CIPA guidelines), allowing photographers to make the most of the high-resolution sensors found in GFX System Cameras, especially when making images hand-held. Highly robust design that withstands various shooting conditions The lens has 11 seals for dust and weather resistance to allow for peace of mind in tough environments, allowing for operation at temperatures down to -10 degrees Celsius / 14 degrees Fahrenheit.