Try not to flinch 20 seconds into this video by Carl Zeiss when the expensive lens makes its slow motion collision after being dropped from several feet above the table. It may be slightly painful for photographers to watch the lenses as they are dropped, shaken, and subjected to extreme heat and cold. But it's also fascinating to be get an inside look at how the manufacturer tests its lenses in order to improve on future lens design. Check out the video below. Then check out this sample image gallery from the new Zeiss 15mm lens and let the video really sink in.