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Occasional Contributor
Posts: 7
Registered: ‎07-29-2017

Re: 1st Gen 70-200 2.8 IS focus issues

Testing the lens using the center point is useless because I'm not going to shoot with the center point.

I'm shooting vertically and using one of the focus points in the second row down, usually the end one on either side depending on whether the actor is facing slightly right or left.

Camera is on a tripod, although I have the head slightly loose so I cam adjust for the subject moving .

I have sequences of a dozen shots in a row, where the subject hasn't moved, the focus point is on the eye that I want it to be on, and the focus is randomly jumping between forward focus, in focus and back focus.

Before I send the lens in for service, or maybe upgrade to a Mark III, which I wanted to avoid since I might be buying an R5 and R6 when I can get my hands on one, I wanted to see if other people have seen the same behavior or if using a setting other than single point spot focus will help.
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VIP
Posts: 13,187
Registered: ‎12-07-2012

Re: 1st Gen 70-200 2.8 IS focus issues

"I thought this was about the lens, not AF points"

 

The answers, suggestions or advice is meant only to help. Nothing more.  It is, still, I believe, you not understanding how the lens and camera work together. A simple test using just the center focus point will tell you if it is the lens or your technique.

If the photos come out consistently OK, you know the answer.  If they do not call Canon. If you don't like our replies call Canon. 1 (800) 652-2666

 

EOS 1DX and 1D Mk IV and several lenses!
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VIP
Posts: 10,593
Registered: ‎08-13-2015

Re: 1st Gen 70-200 2.8 IS focus issues

[ Edited ]

@dcsimages wrote:
The shots are not off consistently in the same direction, but a focus micro adjustment is the first thing I checked.

If this means the lens is not the problem, what other source of [error] is there?  

 

Like I said, contact Canon Support.  Let them help you firgure out the issue. 

 

FREE TIP:  I never use Spot Focus handheld, only on a tripod.

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"Doctor told me to get out and walk, so I bought a Canon."
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Occasional Contributor
Posts: 7
Registered: ‎07-29-2017

Re: 1st Gen 70-200 2.8 IS focus issues


@Waddizzle wrote:

@dcsimages wrote:
The shots are not off consistently in the same direction, but a focus micro adjustment is the first thing I checked.

 

FREE TIP:  I never use Spot Focus handheld, only on a tripod.

I wrote several times that I'm shooting on a tripod, but apparently reading comprehension is not your strong suit.



 

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Moderator
Posts: 179
Registered: ‎08-20-2018

Re: 1st Gen 70-200 2.8 IS focus issues

Be nice everyone! 

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VIP
Posts: 13,187
Registered: ‎12-07-2012

Re: 1st Gen 70-200 2.8 IS focus issues

Porcha may I ask what was not "nice"?  Perhaps some clarification would help us as I saw nothing not nice or offending.  If a person decides to reject our advice it isn't because we are not being nice.  It is what we believe will help.

EOS 1DX and 1D Mk IV and several lenses!
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Moderator
Posts: 179
Registered: ‎08-20-2018

Re: 1st Gen 70-200 2.8 IS focus issues

Please be respectful of everyone's opinions, belittling someone's opinion can be offensive. We can all agree to not agree on things. 

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VIP
Posts: 13,187
Registered: ‎12-07-2012

Re: 1st Gen 70-200 2.8 IS focus issues

Sorry I still do not know what I said to offend the OP.

EOS 1DX and 1D Mk IV and several lenses!
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