Thread: When shooting RAW, is it better to overexpose or underexpose?

Page 4 of 4 FirstFirst ... 234
Results 31 to 33 of 33
  1. #31  
    Senior Member
    Join Date
    Dec 2012
    Location
    Fairfield, CA
    Posts
    156
    Quote Originally Posted by alex.stefani View Post
    Eddie, thank you very much for your clear and detailed post, your contribute to this forum is really precious!

    PS. any news about a new CCD cam? I remember an old discussion on BMCuser
    Glad to be of some help!

    And sorry, no news on that just yet
    Eddie Barton

    My blog where I write about math stuff related to video: https://iaremrsir.wordpress.com/
    Reply With Quote  
     

  2. #32  
    Senior Member
    Join Date
    Aug 2014
    Posts
    125
    Quote Originally Posted by iaremrsir View Post
    These actually aren't subjective numbers. These are, as stated before, based on the data from the BMD Film curve LUTs, DNG metadata, and independent tests. The independent tests were just used as supporting evidence. I provided the math behind calculating these numbers for generating the charts on the Blackmagic forum a while back. I wanted to be as objective as possible in making these charts. A lot of the time, there is still valid data in the noise floor that can't be viewed on a scope, but is still visible in the image. The data is there at the bottom and you'd be able to see it in a log image, whether it's considered usable or not is up to the user.
    Which is why I said they were subjective. But I understand you're an engineer at heart, and your tests were probably very objective. I didn't mean to imply otherwise. Just that different people have their own definitions of what dynamic range means. If you say the sensor is able to record data 8 stops under, I believe you. It lines up with Blackmagic's stated dynamic range. Out of curiosity, how did you test this? Did you shoot a chart and average out the noise?

    Quote Originally Posted by Tomas Stacewicz View Post
    Thank you iaremrsir and RyLo for your answers! Really made it much clearer for me seeing those diagrams and curves, and the comments. :-)

    Is it ok to quote you both on my blog?
    It's okay with me, but I'm far from the first person to say any of it. I also need to add a correction, I'm used to thinking in ProRes and usable dynamic range. Technically, if you're shooting RAW, ISO is just metadata, so no ISO has an advantage in dynamic range. Also, I think 1600 ISO actually has the greatest dynamic range in ProRes, and it's the only one that exceeds 100% on a waveform. But as I said, it's a little too noisy for me. I also should clarify, that I'm basing this off of the Pocket, which I'm told is more or less the same as the BMCC. Your mileage will vary from camera to camera and manufacturer to manufacturer. I'm sorry, I feel like I've contributed to making this topic more confusing than it should be. The takeaway is that you'll have less noise if you overexpose RAW and then bring the exposure back down in the RAW converter (which, in the case of the BMPCC, happens automatically when you set the camera at an ISO lower than the native 800 and expose for that setting).

    Does that make things a little more clear? Or have I muddied it up again?
    Reply With Quote  
     

  3. #33  
    Quote Originally Posted by RyLo View Post
    Does that make things a little more clear? Or have I muddied it up again?
    Crystal clear :-)
    https://guerillafilmsoldier.wordpress.com/

    Camera
    Blackmagic Pocket Cinema Camera
    Zenit Meteor 5-1 f/1.9 17-69mm
    RafCamera M42x1-MTF lens adapter
    Krasnogorsk-3 pistol grip with telescopic shoulder stock
    Fancier FC-270A Tripod with FC-02H Fluid Head

    Workstation
    Windows 10 Pro
    Resolve 12.5.3.014
    ASUS X99-A
    Intel Core i7 5820K 3.3 GHz 15MB
    16GB RAM Corsair DDR4 2133MHz CL13 Vengeance
    ASUS GeForce GTX 1060 Dual OC 3GB
    Samsung 750 EVO 500GB SSD
    Seagate Desktop 2TB HDD
    Reply With Quote  
     

Similar Threads

  1. Shooting on 8mm Video
    By analog_addict in forum Cinematography
    Replies: 5
    Last Post: 04-14-2015, 10:40 AM
  2. Is everyone shooting ASA 800???
    By J.F.R. in forum General Discussion
    Replies: 16
    Last Post: 10-25-2013, 07:10 PM
  3. Are you shooting more with compressed or RAW?
    By mintcheerios in forum General Discussion
    Replies: 5
    Last Post: 05-30-2013, 06:56 PM
  4. Shooting the breeze
    By JJGross in forum Footage / Frames
    Replies: 5
    Last Post: 05-07-2013, 01:04 PM
  5. Shooting RAW or 10-bit 4:2:2 Compressed?
    By mintcheerios in forum Workflow
    Replies: 149
    Last Post: 05-29-2012, 06:27 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •