I use the Dive and See DNC-7A with my GH4.
It's been very reliable for me, and a battery charge easily lasts all day.
The colour rendition was never great, but it's time I checked all the settings; I'm scared of all those buttons along the bottom so I haven't touched any of them for over 2 years
I don't use the shade anymore because it tends to obscure the red record symbol at the top of the screen. I don't miss it.
I have it mounted with a ball clamp like in this photo.
- adamtaylor likes this