Jump to content

about dynamic range

Recommended Posts

I think, though not sure, that it's calculated by the slope of the gamma function.  Where did you find this reference to 800%?

I have an old Panasonic Varicam where, I assume broadcast DR is 100% and about 6 stops.  And 500% setting is about 11 stops.  If that helps you 🙂

Share this post

Link to post
Share on other sites

Its a common LUT in most Sony cameras  .. or MLUT as they call them.. the M being Monitor.. its a gamma curve .. used for monitoring slog .. useful in the EVF and to monitors .. is that where you are seeing it..

Share this post

Link to post
Share on other sites

I'm not sure where he is seeing it, but Canon has been using the 800% number for a while when advertising cameras with WideDR. Specifically their ENG Cameras (XA and XF series).

Share this post

Link to post
Share on other sites

Stops above native, whatever native is for that camera.

Stops double the amount of light every time, so 800% is three stops above 100% (200%, 400%, 800%.)

Er, I think.

Share this post

Link to post
Share on other sites

How much stops there are between 0 and 100% is limited your camera's signal to noise ratio. Say, an F900 had, as far as I remember, 54 dB, which means you won't ever distinguish more than 9 stops in the 0 to 95 (or wherever the knee circuit kicks in) IRE range. 6dB equals a stop. Then you add 3 stops  (=800%) of range cramped in the highlight (say, 95...105) region nonlinearily - either using knee or with some gamma that has a shoulder (like a film H&D curve). In the latter case it's a bit more complicated since the whole "percents" terminology comes from the world of broadcast-legal video that doesn't necessarilly get color graded. 

Edited by Michael Rodin

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • CineLab

    Rig Wheels Passport

    Serious Gear

    New Pro Video - New and Used Equipment

    FJS International

    Gamma Ray Digital Inc


    Broadcast Solutions Inc

    Just Cinema Gear

    Abel Cine

    Visual Products

    Ritter Battery

    Wooden Camera

    G-Force Grips

    Media Blackout - Custom Cables and AKS

    Tai Audio

    Paralinx LLC

    Metropolis Post

    Cinematography Books and Gear
  • Create New...