@LPowell Sorry to be such a pain, but most of this is new to me as for a long time have been getting DSLR to zero exposure and pressing go! I think you're right re monitor displaying as rec709 so even though the camera is seeing the superwhites in J-Log they are not there to bring down, or FCPX is converting the footage to rec 709 on the way in as I am seeing a flat line at 700mv so I think it is cutting out the superwhites either on import or display. I'm not sure what to do about it as using an imac and a Dell U2413, not sure what I'd need to set to to read super whites to then pull down and can't find anything in FCPX's limited settings. Time to move to premiere? But as JVC do the LUT for FCPX you'd think there must be a way of showing the footage OK. Oh lordy, I am a bit out of my depth I think. every time I think I've got it sorted something else comes up! Thanks for your help so far and don't worry if you're too bored of answering these questions to answer again!

@belfryman

Use

http://www.personal-view.com/talks/discussion/15102/leeming-lut-one-released-for-the-jvc-gy-ls300-video-camera#Item_15

For anyone who buys the camera I found the mount v tight at first, solution if it won't release the lens was just to turn slightly in the opposite direction, obviously not for long or with much force as it would break! and then release as normal, seems to help it to let go. Getting more and more happy with the camera.

@belfryman The spot meter is erratic, and the "400%" and "800%" provide no reliable indication of when highlight exposure exceeds 100%. I found the spot meter distracting and useless, so I turned it off. My advice: Set the upper and lower histogram markers to the extremes to produce an all-white, clearly legible histogram. Then set the low zebra level to 100% and the high zebra level to "over". This will help you gauge when the highlights blow out at 108%. You'l find, however, that even in J-Log1, the tone curve will flatten out past 100%, so for best highlight detail, set exposure level just below the point where the zebra starts flashing. In Rec 709 gamma, I'd recommend setting the highlight knee at 85%, and again use the zebra to spot the superwhites.

I wonder if the native is actually 800 rather than the 400 which I read. When I set the low position to 640 iso the psot meter goes to something like 566, if I set low to 800 iso it reads up to 800%. I think this must be it. It's not the switch position it's the ISO which determines whether the super whites are permitted or not.

@belfryman The spot meter numbers are meaningless. Trust me, just turn the damn thing off and use the zebra.

Is there a cheaper body to match/use as a B camera to the LS300 in JLog? Or in standard profiles (not in JLog)?

@LPowell COOL :-))))

@balazer With Gamma set to J-Log1, Color Matrix is preset and cannot be changed. In J-Log1 mode, the only user-adjustable settings are White Balance, ISO, and manual exposure settings.

I'm going to buy the LS300 soon now that one of our AF101's has been damaged beyond likely repair, its looking like a good piece of kit, shame its missing Waveform monitor and dual Zebra setting to flick between, otherwise I'm excited about this AF101 successor, once i have it delivered I'll post some side by side comparisons with our AF101 from some real world corporate shoots and post the results.

Thanks for posting @Belfryman, nice looking footage, and so much more helpful to judge from than the usual cat/garden/wall/tree test shots

have some docu and interview footage I'll upload when i get chance.