90d and Tamron 150-600 - sharpness issue or wrong expectations

Started 4 months ago | Discussions thread
OP BlueFish1980 New Member • Posts: 11
Re: 90d and Tamron 150-600 - sharpness issue or wrong expectations

Ray UK wrote:

Doesn't look very good to me. Possibly back focusing a little but difficult to tell from those shots, the first 2 are much too high an ISO value to make a judgement, in the other 2 it is difficult to tell what you are focused on.

Post some more shots taken at ISO100 of subjects that have some depth so that we can see where the focus point should be.

Thanks for the response, I don't have much with ISO 100, should I be having?

Here is one I thought I focused on the bird, at ISO 250 but it didn't. So it does look like I have a front/back focus?

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