Metabones has announced a new Speed Booster designed for the Panasonic Lumix DMC-GH4. The Speed Booster XL 0.64x is designed to reduce the camera’s 2x crop factor by 0.64x, meaning that in 4K video mode the GH4’s 2.34x crop factor becomes 1.50x – Super 35 cine format. Read more
Articles: Digital Photography Review (dpreview.com)