What Lens ?
I just blogged that we use a Black Magic Pocket Cinema Camera for the web series Shades Of Bad and questions came in as to what lens we use. You are all correct it is a smaller sensor and the camera natively uses an EFS lens, the smaller lens with less glass.
Sure it is OK to use the EFS, but we worried about low light and tried to forward think some situations where we might get into a low light situation. The cameramen we were set up to use wanted to use Canon EF USM lens if they could, not to use the auto ficus, but just they are better lens.
There are simple passive converters then there is the Metabones which we opted for.
-1 The metabones is active so the negative is that it draws from the battery especially in low light when it is helping you see in the dark - to counter balance that the batteries are real cheap and we carry 12 in the kit.
-2 The second small negative is that on really fast lens the Metabones is so good, added to the camera, that in bright sunlight it just over exposes so we have had to buy ND's which is not a bad thing. We have had up to 6ND and a UV filter on the standard lens and more on the 80 to 200 which seems to be the brightest.
+1 is that you can use the EF Lens.
There is a metabones for most conversions, so before you think a camera won't fit a lens, look at the Metabones. Click here for details.