TSE 17mm Blurring

[wildwoodphoto]

Please look at this image taken with the Canon TS-E 17mm f4 on a Canon EOS 5D MkIV at f7.1 ISO 320 0.3 sec. The lens is shifted down slightly.

If you look at the corners, all look sharp except top right side around the window and coffee machine area

Why is this, and can it be fixed?

[wildwoodphoto]

Hi Ricky, good suggestion. I tried it, but the issue remained the same. The only way to resolve it was as per Rodger's suggestion, which was focusing further into the subject.

I'm not sure why in the initial example that the focus was 'off' only on the right side, and not the left too. Is this focus falloff on one side, or one area of the lens/frame what I should expect with this lens?

[Anonymous]

It looks like the right side of the scene is much farther away from the camera, compared to the left side. It seems evident that you ran out of depth of field for the right side. I don't think that the lens is to blame.

[wq9nsc]

Yes, that is what I saw also.  You can see the softness increase linearly across the back of the image from left to right as the farthest part is angled further from the lens.

Rodger

[wildwoodphoto]

Actually the centre (where the clock is) is further away from the camera than the right side.

[wq9nsc]

But what did you use as your reference when you focused?  It is the relative distance from that point that is critical and with the angle I suspect you were focusing at some point on the table in the foreground.

Rodger

[wildwoodphoto]

Yes, the focal point was the second candle jar, approx centre of the frame.