B&H Photo has discounted the SLR Magic 8mm f/4 today so you can get one for $200! This is a great rectilinear lens for micro four thirds, especially for the price. You can watch more SLR magic 8mm f/4 videos below.
https://vimeo.com/205525395
https://vimeo.com/207094562
https://vimeo.com/210022496
https://vimeo.com/215009273
SLR Magic 8mm f/4: B&H Photo