90D + Tamron 150-600 g2

Started Oct 11, 2019 | Discussions thread
OP thomste Forum Member • Posts: 80
Re: 90D + Tamron 150-600 g2

Hi all,

Trying to figure out whether I am making mistake or if the Tamron 150-600 g2 is not good at fast moving subjects, or if it is a 90D issue (unlikely i think).

I used AI Servo and ITR is turned off

for both examples I was using 9 points focusing and the camera/lens seems to have chosen to focus on something else than the actual moving subject.
I can may be understand the confusion on the first example as the background is busy (although it is not in focus either but anyway) but I can't understand why the blue sky would be prioritised against the bird that is across 2 points and more contrasty than the sky?

I had another example, which I can't find anymore (may have deleted the shot) where the bird was across 5 points but the focus was 'acquired' on the top 3 points which was blue sky

Am I making mistakes or is the Tamron 150-600 g2 rubbish at catching moving things?
Would I get better results with the Canon 100-400 ii and 1.4x TC? I understand the 100-400 has better AF but not sure how much the converter affects AF speed

Thank you

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