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VIP
Posts: 9,394
Registered: ‎12-07-2012

Re: Canon 100 X 400 4.5 5.6 L IS 11 USM + 1.4 Mark 11 Extender - Focusing Isues

Man did you nail that post.  I could not have written it better.

 

"You can't always believe in the glowing reviews guys write about how good ...(insert lens model of your choice here!)

EOS 1DX and 1D Mk IV, along with, a lot of other stuff.
VIP
Posts: 9,394
Registered: ‎12-07-2012

Re: Canon 100 X 400 4.5 5.6 L IS 11 USM + 1.4 Mark 11 Extender - Focusing Isues

Not a real recent shot but an interesting one anyway.  It was with my ef 400mm f5.6L.  It was just a super quick snap shot as it lasted for a mere second or two.  It's good to be lucky!  The luckier you are the better photographer you will be.  ANd the better photographer you become the luckier you will be.

 

_52D5203-Edit.jpg

 

EOS 1DX and 1D Mk IV, along with, a lot of other stuff.
Esteemed Contributor
Posts: 4,458
Registered: ‎06-25-2014

Re: Canon 100 X 400 4.5 5.6 L IS 11 USM + 1.4 Mark 11 Extender - Focusing Isues


ebiggs1 wrote:

Not a real recent shot but an interesting one anyway.  It was with my ef 400mm f5.6L.  It was just a super quick snap shot as it lasted for a mere second or two.  It's good to be lucky!  The luckier you are the better photographer you will be.  ANd the better photographer you become the luckier you will be.

 

_52D5203-Edit.jpg

 


Smiley Happy !!

Bob
Boston, Massachusetts USA
VIP
Posts: 9,394
Registered: ‎12-07-2012

Re: Canon 100 X 400 4.5 5.6 L IS 11 USM + 1.4 Mark 11 Extender - Focusing Isues

Something is not the same!  Smiley Very Happy

EOS 1DX and 1D Mk IV, along with, a lot of other stuff.
New Contributor
Posts: 3
Registered: ‎01-05-2018

Re: Canon 100 X 400 4.5 5.6 L IS 11 USM + 1.4 Mark 11 Extender - Focusing Isues

[ Edited ]

I would suggest you try setting the focus macro adjustment.

I use Reikan FoCal. I believe you can get it from B&H.

Use adjustment by lens as the setting.

 

Adjust the lens alone and also do an adjustment with the lens / extender.

 

Your camera will adjust at both ends of the zoom range.

When shooting in the "middle" focal length ranges the camera will use the two adjustments and compesate for the middle focal lengths.

 

Your camera will store infor for the lens only and the lens with extender seperately.

Occasional Contributor
Posts: 12
Registered: ‎04-14-2018

Re: Canon 100 X 400 4.5 5.6 L IS 11 USM + 1.4 Mark 11 Extender - Focusing Isues

I have the Canon 100-400mm II with the Canon 1.4x Extender III on a Canon 80D.

Quick, sharp at 896mm with 27 AF points at f8.

Great combination for wildlife.

Like it so much, I never take the 1,4x Extender off.

Think Canon tuned the latest releases: Canon 80D, Canon 100-400mm II, and the 1.4x Extender III

for performance and image quality.

On a Canon 7D Mark II only one AF point, and just ok results.

More missed out-of-focused images and sluggish AF at f/8

Respected Contributor
Posts: 1,939
Registered: ‎02-26-2015

Re: Canon 100 X 400 4.5 5.6 L IS 11 USM + 1.4 Mark 11 Extender - Focusing Isues

Are you using AIServo or One Shot, you mention both. For subjects that move or MAY move (wildlife) use AIServo.
Highlighted
Occasional Contributor
Posts: 12
Registered: ‎04-14-2018

Re: Canon 100 X 400 4.5 5.6 L IS 11 USM + 1.4 Mark 11 Extender - Focusing Isues

Use AIServo

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