I can only write about the 770 as I don't know the Sony. (I have the 750 which is the older model) My camera has been used in many different shoots including a Ghost Train. In this case the camera was used in total darkness interspersed with flashes of light. It picked up everything but the video needed to be "brightened" in my editor, all the detail was there and there was no sign of the video amps creating noise. (white fuzz)
The zoom is flexible. Optical zoom to 20x and electronic zoom to 50x without any picture degradation. (Intelligent Zoom) The zoom will go up to a daft 1500x but, not surprisingly, pixilation occurs.
The optical image stabilisation has both mechanical and electronic phases which can be switched on or off depending on the circumstances.
Audio, as expected, is reasonable but the wind attenuation only works in a light breeze (it does work though) There is an external mic socket for better mic inputs and a headphone out socket to monitor the sound. The mic socket has a small residual voltage which is enough to power tie-clip electret condenser mics.
The clever bits include a good slow motion record, running at about half speed, with an option in playback mode to reduce this to quarter speed. There is a time lapse facility which can be set to various times from 1 sec between frames to 2min between frames in five steps.
One great advantage of the Panasonic range is that the cameras can be recharged or run from a 5V USB source. (The supplied mains charger and DC lead are USB based) This means that there is no need to buy expensive extra Panasonic batteries. The camera can be recharged from any USB source and I use a 20,000mAh power pack. (AUKEY from Amazon) I bought extra DC leads from Panasonic for about £4 each.
Disappointed in the video that my Rebel t5 takes, I want to purchase a quality camcorder. I will often be shooting indoors (my house is low-light) and outdoors (nature, kids... and their sports).
My price range has me looking at the Sony CX675 and the Panasonic V770. Can anyone familiar with these camcorders please share their opinions on what would be a better purchase?