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Canon C-Log to Rec.709 Exposure Correction LUTs

Every videographer and filmmaker strives for perfectly exposed footage in camera. In reality however, footage always turns out a little over or underexposed. Some videographers always overexpose C-Log for better looking skin tones and highlight detail retention.

Adjusting exposure is a simple fix when editing one or two videos, but terribly inefficient, slow, and potentially inconsistent when editing more.

The 60 custom LUTs in this pack convert Canon C-Log and C-Log 3 footage to the Rec.709 color space and adjust their exposure using the proper C-Log gamma curve. They are designed for use with the Canon EOS R5 and R6 (and C-Log only on the EOS R), and function similarly to exposure compensation on a camera.

Footage overexposed by 1 stop? Use the -1 Stop Rec.709 LUT. Footage underexposed by 2/3 a stop? Use the +0.66 Rec.709 LUT.

These LUTs not only save considerable time and effort when importing and prepping C-Log footage, but they correctly adjust brightness and contrast to match Canon's native C-Log to Rec.709 LUTs. Under and overexposed footage (within 2 stops) are instantly corrected, and appear as if you nailed their exposure in-camera.


Examples

Below are keyframes from three videos shot using C-Log 3 / Cinema Gamut on an EOS R5. The left is underexposed by 2/3 a stop, the middle is exposed correctly, and the right is overexposed by 2/3 a stop.

Underexposed 2/3 (Left), Correct Exposure (Middle), Overexposed 2/3 (Right)

Now let's convert these C-Log 3 videos to Rec.709 using Canon's C-Log 3 Cinema Gamut LUT. 

Same Canon C-Log 3 Rec.709 LUT applied to all three videos

They look okay, but as you can see, the left video is darker while the right is brighter. You'd now need to spend time manually editing the exposure of the left and right videos to match. This not only slows down editing, but there's a chance your brightness and contrast edits may not correctly adjust their blacks, whites, and midtones.

Imagine having to edit an entire project full of footage without this way!

Let's remove Canon's LUT from these three videos and use the C-Log to Rec.709 Exposure Correction Pack LUTs instead. The left video below is now using the +0.66_Stops Rec.709 LUT, the middle is using the Native LUT, and the right is using the -0.66_Stops Rec.709 LUT.

Exposure Correction LUTs applied / +0.66 (Left), Native (Middle), -0.66 (Right)

As you can see, the videos now appear nearly identical! No additional color grading or adjustments have been made. All three videos have been converted to Rec.709 and their underlying exposure issues have been resolved.


The pack includes the following:

  • 1D / Canon C-Log to Rec.709 (13 Luts)
  • 1D / Canon C-Log 3 to Rec.709 (13 Luts)
  • 3D / Canon C-Log to Rec.709 (13 Luts)
  • 3D / Canon C-Log 3 Cinema Gamut to Rec.709 (13 Luts)
  • 3D / Canon C-Log 3 BT.709 to Rec.709 (13 Luts)
  • User Guide PDF


LUTs inside each pack are organized like so:

  • [Lut]_-2.00_Stops.cube
  • [Lut]_-1.67_Stops.cube
  • [Lut]_-1.33_Stops.cube
  • [Lut]_-1.00_Stops.cube
  • [Lut]_-0.67_Stops.cube
  • [Lut]_-0.33_Stops.cube
  • [Lut]_Native.cube
  • [Lut]_+0.33_Stops.cube
  • [Lut]_+0.67_Stops.cube
  • [Lut]_+1.00_Stops.cube
  • [Lut]_+1.33_Stops.cube
  • [Lut]_+1.67_Stops.cube
  • [Lut]_+2.00_Stops.cube


Simply pick whichever C-Log to Rec.709 LUT collection is appropriate for your footage, then apply the "Native" LUT. If footage is overexposed, apply a negative LUT. If footage is underexposed, apply a positive LUT.


Compatibility

These LUTs are compatible with the Canon EOS R (C-Log only), EOS R5 and EOS R6. If you don't see C-Log 3 as a menu option on your EOS R5 or R6, your camera firmware is out of date. Download firmware from Canon through the following links:

Canon EOS R5 Firmware

Canon EOS R6 Firmware


Video overview

Check out my overview and demonstration of these LUTs in the video below.


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  • 60 customized C-Log and C-Log 3 to Rec.709 LUTs for the Canon EOS R5 & R6
  • Size18.8 MB

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Canon C-Log to Rec.709 Exposure Correction LUTs

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