EOS R5 Mark II strange shutter speeds in Tv mode

[czublic]

So I have owned a Canon camera from the days of film and I feel like an idiot asking this question. I just got the R5 Mark2 and when I select Tv [Shutter Priority], I was expecting the Main Dial to change my shutter speed, but not quite as I expected ... 

When I turn the Main Dial I get values like 1/425.9 then 1/428.2 for my shutter speed. Does anyone have a link to explain what I am missing? When I select Fv mode the Main dial works like I was expect it to change. In M Mode the values look like Tv mode again. I thought that maybe I might use the Fv Mode, but I seem to be able to only control exposure level with the Quick Control dial 1. 

I am sure this is some sort of improvement and I would love to understand HOW to use it, but for now I would just like to shoot Tv with my old familiar settings 🙂

-cbz

[p4pictures · Accepted solution]

You have high frequency anti flicker shooting enabled. 

HF anti flicker works by fractionally adjusting the shutter speed to avoid banding from high frequency - often LED - lighting. 

[czublic]

Thanks this is a new feature since my 5Ds and it makes sense that it would work that way. This setting probably deserves a spot in MyMenu 🙂