I just finished reading the other thread concerning both of these lens, but the poster was having focusing issues with the 14mm on an Olympus camera. I own the Panasonic Gh2. One of these two lens is going to be bought for me as payment for some photography work. I will be photographing Christmas lights in darker situations....lights on Palm Trees, buildings, and some indoor club house lighting work too. I will own the lens and need a faster lens for my own personal use too---photographing my new grandchild, etc.. I also take a lot of video too. I wish I could own both, but I can't!!