kowa

Here's a behind-the-scenes look at how Japanese lens maker Kowa creates its Prominar line of lenses for Micro Four Thirds cameras. The 3-minute "how it's made" video above steps through each of the stages of manufacturing, from designing the lenses on a computer to putting the components together into a final product and testing its optical qualities.

Flickr member scenery_and_fish found a Kowa 65mm f/0.75 x-ray lens, and mounted it to a Nikon D90 by using macro extension tubes and epoxy. The lens is fixed focus, lacks an iris, and is one beastly piece of glass.