EOS R5 Fails to Focus

[Maverick87]

Hello,  few days I bought the Canon R5 with Canon adopter (I got Sigma 150-600mm Contemporary), today I got a AF focus problem when the subject I wanted to photograph (it was an airshow), I pressed the AF back button and instead of locking it was blurry (out of focus).

I saw some YouTube videos and I disconnected the lens and reconnect her and I noticed that No matter how AF mode I'm choosing (in my case it's always square with cross and instead of locking on subject it search for it. It runs to search for subject. 

I did a double reset,  one to the lens and one for the camera. Still the same and I don't know what to do.  

I hope I was clear, cause it's my first time..

Thanks 

[ebiggs1]

There have been issues using the Sigma 150-600mm Contemporary on Canon mirrorless cameras. I don't think it has been sorted yet. I don't have an R5 to test it on though.

[Maverick87]

It was fine today till I disconnected her.. It still works but no matter what AF you choose,  it's running instead of be locked. Like it searching for the subject.  Never that kind of an issue.. I also got 5D MK IV and 6D. 

[ebiggs1]

Yeah, I hear you but I don't think it will be better until one or the other creates and upgrade of some sort.

[Maverick87]

They don't care.. I check for updates each day..

[shadowsports]

@maverick87,

At least 2 of us here have the 150-600c.  @Trevor and myself.  He recently did a showcase on the lens's performance adapted.  I believe it was with stationary subjects (can't remember).  For BIF and planes, you'll want to use one shot AF and not servo.  The adapted lens can have issues locking and tracking.  This can depend on subject (and speed if moving), available light and background.  Some shooting conditions are better than others.  Keeper rates can vary.  

[Maverick87]

No matter what you want to lock the AF, he's searching for the subject... For example you want single spot, it searching for a subject when you press the AF back button instead of having a single spot.. 

It was fine in the morning..

[shadowsports]

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@Maverick87 wrote:

No matter what you want to lock the AF, he's searching for the subject... For example you want single spot, it searching for a subject when you press the AF back button instead of having a single spot.. 

It was fine in the morning..

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I'm sure nothing on the camera or lens "has changed" since this morning.  Maybe the shooting conditions.  

[Maverick87]

No matter what you trying to lock the AF you getting points running instead of square.. You can't change the mode it still the same..

[ebiggs1]

"It was fine in the morning."

It will be intermittent or inconsistent. That is the issue as I understand it.  There are several Youtube reviews of this issue. My Siggy C works perfectly on my 1DX but as I stated I don't have an R5 to test it on. Perhaps I can borrow one and report back later. I rarely, never, use the C, however, as I prefer the Sigma Sport 150-600mm.

"They don't care.. I check for updates each day.."

I can't imagine Canon abandoning the after market lenses. IMHO, that would be a disastrous mistake. The mirrorless camera tech is new and perhaps the rest have just not been able to catch up yet.