Justin Westfall

http://kippertie.com/?product=lowcon-olpf-carbon

I would recommend looking at F-stop http://shop.fstopgear.com/us/product.html

I've worked for a DP who often used a 1/4 Low Con on his Epic, in fact he told me that there is a low con in front of the Alexa sensor (part of the OLPF I would assume) and it helps to get some of the creaminess that the Arri's have. Not sure if that is at all true, but I have heard other people say that, read it on other forums as well.