Using the Panasonic GH4 with Canon glass?

I'm really putting some thought into this Panasonic GH4, mainly because I want the 4k video.  What I don't want to do is have to go out and buy all new lenses.  How is the workflow and quality using Canon glass on the GH4?  Is there any image quality compromised when using NON Panasonic/Lumix glass?

Thank you

I am in a similar situation: my main camera is a 6D and I use a converted GX1 for (most of) my IR work. Canon-to-MFT adapter are of three kinds:
a) completely manual: basically a piece of plastic/metal that allows you to attach the lens to the body; pros: very cheap; cons: no control at all on the aperture;
b) manual with built-in iris: as above, but the adapter has an iris that can be used to regulate the aperture; pros: quite cheap; cons: the blades are not were they are supposed to be, therefore you are likely to have flares and other issues. Also, the aperture scale is not in f-numbers so you have to guess somehow;
c) www.metabones.com/products/details/MB_SPEF-BMPCC-BM1 this guy is capable to control the aperture and it is also a speed booster, that is it increases the maximum aperture of your lens. Pros: in principle, solves all your issues; reviews are good; Cons: very expensive!

I use method a). When I want to stop down my lens, I have to mount it on my Canon body, set the aperture, press the DOF preview button and unmount the lens without releasing the DOF preview button. As you can imagine it is not very straightforward, but in my case I use almost exclusively my wideangle L lens on the GX1, so it is doable. If you are planning to use all the lenses you have, it may make sense to buy the metabones but I am not sure about the effect on IQ (it has a glass element). Ideally I would try to rent the GH4 and the metabones before buying anything.

Hope this helps.

I'd be curious if when recording in 4k and using non native glass if that effects the video quality:?

Robert Chen wrote: I'd be curious if when recording in 4k and using non native glass if that effects the video quality:?

Why do you believe that would happen?

I just bought this camera and bringing with me to America in our upcoming Oct trip.  I bought 2 lenses, the Panasonic 35mm f/2.8 and the 14-140mm f/4-5.8.  If you haven't seen it there is a good interview on this site where this question comes up.  I watched it last week right before ordering.  Give me a min, I need to find the link. 

Found it!  I had to search my sent box because after watching I forwarded this link to a friend who is also looking for a 4k camera.

http://www.photographytalk.com/learnexplore60  

Dragonflies wrote: Found it!  I had to search my sent box because after watching I forwarded this link to a friend who is also looking for a 4k camera.

http://www.photographytalk.com/learnexplore60  

Santa is supposed to deliver this to me this year

Robert Chen wrote: I'd be curious if when recording in 4k and using non native glass if that effects the video quality:?

Not at all, you just don't get the auto focus 

This is what you need:  www.metabones.com/products/details/MB_SPEF-BMPCC-BM1