Canon Log settings on the EOS-1D X Mark III.

Article ID: ART176592

Date published: 03/18/2020

Date last updated: 03/18/2020

Description

Canon Log gamma curve takes full advantage of image sensor characteristics to ensure wide dynamic range for movies that will be processed in postproduction. With minimal loss of detail in shadow and highlights, movies retain more visual information across the dynamic range.
To work with Canon Log movies in postproduction, you can apply look-up tables (LUTs).
LUT data can be downloaded from the Canon website.

Solution

1.	Select [: Canon Log settings].
2.	Select [Canon log].
3.	Select [On].
4.	Set the options as desired. Set [View Assist], [Color Matrix], [Characteristics], and [Color space].

Canon Log

On
Enables 10-bit recording of Canon Log movies to the card. Movies can also be recorded to an external device that supports 10-bit recording.

View Assist

When played on the camera, these movies may look darker and have lower contrast than movies recorded with a Picture Style applied, due to Canon log image characteristics, which are intended to ensure a wide dynamic range. For clearer display that m akes it easier to check details, set [View Assist.] to [On].

Setting this feature to [On] does not affect movies recorded to the card, which are recorded using Canon Log. Similarly, HDMI video output has Canon Log characteristics, and View Assist is not used for it.

Note

[] is shown on the information dispolay screen during movie recording with View Assist.
When set to [On], View Assist is also used with magnified display.

Color Matrix

Using a color matrix, you can specify how colors are reproduced, to plan for postproduction processing.

Cinema EOS Original
Reproduces colors equivalent to those of the EOS-1D C.
Neutral
Reproduces colors similar to actual subject colors.

Characteristics

Adjust as needed. Select an item ([Sharpness: Strength], [Saturation], or [Hue]), adjust the effect level, then press <

Sharpness: Strength		0: Weak outline emphasis	7: Strong outline emphasis
Saturation		-4: Low	+4: High
Hue^*	Reds	-4; Toward magenta	+4: Toward yellow
	Greens	-4; Toward yellow	+4: Toward cyan
	Blues	-4: Toward cyan	+4: Toward magenta

^{* Reds, greens, and blues cannot be adjusted separately.}

^{Color Space}

[Color Space] can be set when [Canon Log] is set to [On] and [Color Matrix] set to [Neutral].
Choose [BT.709] or [BT.2020] as the color space for HDMI output.

Shooting Settings

Manually setting the ISO speed to 100-320 will make the dynamic range narrower.
Canon Log offers a dynamic range of approx. 800% at ISO 400 or higher.
ISO 100, 125, 160, 200, 250, and 320 are expanded ISO speeds. [] is displayed when an ISO speed is set.

Canon Log Image Quality

Noise may increase slightly.

Caution

With Canon Log, autofocusing may be more difficult for subjects under low light, or for low-contrast subjects.
Canon Log 2 and Canon Log 3 are not supported.