For users of the HVX200/170

D

DanHD

Well-known member
I have a shoot tomorrow for a client who does rock climbing. We'll be out on the rocks, and in the harsh daylight sun. I'll being the usual reflectors and maybe some silk to post up for some of the interview stuff out there

Now, the problem is, I own a small sensor camera (hpx170) that doesnt do too well in highlights.

Or at least in CineD, with which I prefer shooting in, for DR and greater tonal detail for timing in post

I know that CineD has no knee function to bring those highlights down to a reasonable level, so it basically looks like sh*t outside unless you take great care to protect your sensor from hotspots and blown out areas ect

of which i'll have no time to do

so, should I shoot with a low knee, in a non-cine gamma mode?

Is that usually what you guys do when shooting alot outside and dealing with lots of lighting contrast?

the cine gammas just look so damn good though...do I have to give them up if I want to keep highlight detail?
 
Keep your zebras on 105%, and don't let any zebras show up. That way you can keep the Cine-D that you like, and avoid overexposing. Just ride the iris and keep the zebras off the screen.

Going with a non-cine gamma and using the knee will give you some rolloff, but if you still let it overexpose, it'll still get ugly when it finally blows out. Overexposed video = ugly video, regardless of the gamma.
 
now I am confused, why would you set your zebras at 105 if you are using cineD and nothing is overexposing close to 105 you are still clipping
 
believe it or not these things hold detail to almost 110...

I didn't believe it till I saw what a colorist did to some footage on a davinci 2k. he made a blown out whiite sky suddenly reappear.... it was friggin amazing. I had set zebras at 100.. and a big portion of an over cast sky was hitting 100 so I figured iit was lost... but it wasn't....
 
Clipping happens at 110. If you see no zebras with your setting at 105, then that means everything in your scene is 104 or below, which should mean you're immune from having clipped highlights. If you prefer you can certainly set your zebras to 100 or lower to keep further away from the danger zone; I was advising 105 because I figured Dan needs the widest possible dynamic range.
 
TimurCivan said:
believe it or not these things hold detail to almost 110...
Click to expand...


Holy crappola!!! I did not know this I always use mine at 100 and never let anything show up, so that means we can get the best dynamic range at 105 or 110 and CineD? new posibilities eh
 
Not a BIG difference, but cine-D does have extended range. Cine-V is optimized for display on a television. cine-D is optimized to stretch out as much dynamic range as it can get.
 
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What exactly does CineD do to achieve that range in contrast to V?


Does it stretch the blacks more and pull down the mid tones?
 
And also, how does CineV handle highlights in comparison to D?

Will I get more tonal gradation in the highlights (say the stuff above 90IRE) with CineD?
 
Yes if you look at a Waveform you will see that detial doesnt clip to white till you get pretty close to 110.

I still try to keep it at 100 or below though....
 
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