EOS C70 Zebra's after 85% don't work.

[scottwild]

I'm using a C70 and the Zebra 2 setting works great all the way up to 85%, but as soon as I select 90% or higher, they disappear. Does anyone know what is going on?

[rs-eos]

I don't own this unit myself so cannot try it out.   In looking in the User Manual, there's some info in the Troubleshooting section on page 184.   Though I would have assumed that would affect the display of any zebras and not zebras at specific levels.

If you say crank up the gain/ISO, will zebras eventually show when at 90% or higher?

Maybe you'll need to do a reset of settings?  Though I would strongly recommend first saving the current set of settings to an SD card for safekeeping.  Though do note the settings that will ultimately not be stored.  See page 117 of the User Manual.

[rs-eos]

Just caught a video that explained a bit about zebras on the C70.  Are you shooting perhaps in Canon Log 2? If so, that seems to affect the zebras.  Whereas if not capturing in log, then zebra settings above 85% seem to work.

[scottwild]

That is correct. I just learned that zebras don't work after 85% with C-Log2 because they if you were to apply a lut to them they would clip like they are at 100%. So yeah, 85% is the clipping point of highlights in C-Log2.

[gary-redeye]

Just saw this in the R5 MKII manual too Scott.

Confusingly, the manual doesn't make reference to 85% specifically, but it does say "The maximum brightness values does not reach 100% when the Custom Picture gamma is set to Canon Log 2"

I do wish these oddities were better explained. 

Frustrating too that (for example) Focus Peaking and Zebras cannot be used at the same time. And False Colour cannot be allocated to a button; and cannot be used at all if View Assist, Focus Peaking and / or Zebras are on.

If I briefly need to use False Colour, I don't need to be concerned with Zebras and Focus Peaking at that moment, so automatically & temporarily disabling / enabling them could easily be a part of a False Colour activation and deactivation toggle.    

I think these focus and exposure tools are fundamental to many users and should be readily accessible. In the case of False Colour and Zebras, the R5 MKII (and others) should be more than capable of displaying the correct expose and focus data based on the current and combined user settings.