HDRx simple question

[Pawel Tybora]

Hello
A simple question maybe to someone from RED... why Epic (Scarlet) in HDRx mode use shutter instead of changing the ISO or Flute. Had compensation followed by changes in the ISO would not be a problem with different values ​​of the motion blur (like right now). Many DP complains about it when compare the picture of the Epic (HDRx) with the picture of Alexa...(strange motion blur ghosting)....And they dont want to useHDRx. Just the question.

pawel

 

[Jacek Zakowicz]

Pawel ISO is just meta data so even when you change it the recorded image is identical.
There are only two ways to change exposure- just like with film:
1.Change the shutter speed
2. Change the iris on the lens
Changing iris 50+ times a second is not practical so the only way left is the shutter speed.
I hope that's clear now...
actually there is third one- apply NDs 50+ times a second- not very practical either...

 

[Martin Stevens]

Hello
A simple question maybe to someone from RED... why Epic (Scarlet) in HDRx mode use shutter instead of changing the ISO or Flute. Had compensation followed by changes in the ISO would not be a problem with different values ​​of the motion blur (like right now). Many DP complains about it when compare the picture of the Epic (HDRx) with the picture of Alexa...(strange motion blur ghosting)....And they dont want to useHDRx. Just the question.

pawel

My view is that the HDRx feature in the Epic and Scarlet is a fantastic tool.

In order for a camera sensor like the MX to achieve this same range of Highlight extension by using "gained" ISO as
opposed to Read Speed, the Dynamic Range (DR) of the Sensor would need to have 6 stops more DR than it does
now. The irony here is that if it had 6 stops more native DR then you wouldn't need to use this ISO HDRx feature
because it would already be capable of natively capturing what you are after, which is lots of DR.

 

[Pawel Tybora]

Hi Jacek you are right....my bad (I play with HDRx in RCX, and here in Warsaw is late )...cut the light is the only solution...or wait for "wider" Dragon...

 

[Uli Plank]

Hi Pawel,

you're gonna like it, and get DaVinci Resolve to unlock it's full potential.

 

[Pawel Tybora]

Uli, personally I like this very much...I am all with RED and I like RED footage from the beginning (I worked as a vfx supervisior on "The Mill and the cross" fim by polish director Lech Majewski with Rutger Hauer, Michael York and Charlotte Rampling filmed on M sensor...here in polish reality this was really something). However some people do not like and nothing can convince them. Many people especailly working in TV company...just grab footage as is (WYSIWYG) (and I'm not talking only about HDRx but also generally)..and then they say the RED sucks.

regards
pawel

 

[Graeme Nattress]

Most of the time HDRx is not necessary. It's actually really hard to set up a suitable lighting condition with enough contrast to make it necessary. I remember trying to get some demo footage for a friend to play with, and I went out of shoot HDRx and even on the bright sunny day the shadows were not deep enough to warrant it. In the end we could make great images from either of the HDRx exposures, proving that mode had been unnecessary in our shoot.

When HDRx is useful though, it's very good. It does need some care on setup, but it works and works well. The motion blur is mostly invisible under playback, assuming the shot was a suitable one for HDRx in the first place.

There's a few ways to look at things though - saying "I don't like it" is fair enough. You can make entire movies without needing it. Most of the time HDRx is not necessary. But to look at the effect and say "I might not like it as is, but I could do this with it and it would look great" is a much better approach. Unfortunately, Pawel, there are people who won't like RED and will say things like that. Nothing much we can do about it other than our usual work to improve all out products and listen to feedback.

Graeme

 

[Pawel Tybora]

Well said...I agree with that and nothing to add

pawel