Sony a7s Video Test at Lake Eola Park. I got a lot of lens flare and light leak using eBay cheap adapter for M42 lens to Sony NEX FE lens mount(Similar to FOTGA M42 to Sony E-mount Adapter). I use Image stabilizer in FCP-X for when I zoom in and out with the 80-200mm Soligor lens. No transcoding were done, just straight from the card to FCP-X. Was shooting in XAVC-S 24 frame per sec, 1080p and ISO 1600 and my F-Stop was from f/5.6 to f/11most of the time. Some shot were over exposed. Lens were: Yashica Dashinon DS 50mm f/1.7 and Soligor 80-200mm f/3.5 lens with eBay dumb adapter m42 lens to Sony FE-mount.