I am trying to find a cheap solution for an ultrawide fast lens on micro four-thirds. I already own a manual speed booster with a reducing lens and aperture blades. I'm looking to create a full frame equivalent of 15-30mm and a max. aperture bigger than f2.8.
Considering all things manual, is it better to use a wide full frame lens with a speed booster on a µ4/3 camera, rather than a native lens? µ4/3 lenses are rather expensive for me (I'm talking above US$500), considering the additional stop of max. aperture that I gain with the adapter?
I know that the question is rather generic, but I'm having fun filming on the cheap o_0