Metabones Speed Boosters and focal length reducing lens adapters from other brands have become very popular over the last few years as more people take to smaller sensor formats like APS-C and Micro Four Thirds for shooting both stills and video. There are a number of them out there now, although Metabones continues to be held in the highest regard. Now, Metabones has announced a new series of seven Speed Booster adapters specifically designed for using various non-Micro Four Thirds lenses with the Blackmagic Pocket Cinema Camera 4K.
For the wide aperture lovers, the way to get an f/0.9-35mm lens for $350 has been here for a while (see video at the end of the post). However, did you know why using a 50mm, f/1.2 lens with a speed booster actually gives you an f/0.9, 35mm lens? There is quite a bit of math involved but Jimmi Kai manages to squeeze a pretty understandable version of it into a nine minutes video. (Along with some other great tips and physics nuggets)