" Micro Four Thirds lens mount system produces professional level images while greatly reducing the overall size compared to traditional DSLR lensesbr Built-in Optical Image Stabilization reduces blurry pictures due to hand movement that is especially useful at longer focal lengthsbr Maximum fstop opening of 40 at 45mm wide to a minimum of f22 with a filter size of only 52mmbr 16 elements in 13 groups utilizing 7 circular aperture diaphragm blades with a total weight of only 134 ouncesbr Standard accessories include front and rear lens caps lens hood and lens storage bag br Panasonic 45-200mm f4.0-5.