God I hate this made on iPhone bullshit where they strap canon L lenses on the front and the rest of the rigs etc. What is the point? You used an inappropriate tool and could still make something look good, congratulations, that Canon glass, Sony sensor, Samsung memory really came through. The first time it was done, OK nice experiment, but by the 100th, why?
You could have got DSLR bodies that cost less, actually use the image stabilisation and the other things which require feedback between the lens and body. It's no wonder pretty much all the things I have seen like these are cheesy, the whole idea is pretentious as fuck.