EJ takes a look at yet another anamorphic lens solution for DSLR filmmaking.
You can find more information about the Focus Module at http://anamorphicshop.com
On the GH4 with the anamorphic mode, the widest lens I could use was 50mm with the Metabones speedbooster.
You can search on ebay for rail systems and rail-blocks to help support the lens. I used a neewer rail system and a smallrig rail-block.
If you have any question, feel free to ask in the comments.