Originally posted by Tjompen1968 The problem you have is that the lens does not stop down. Check your lens to see if the aperture is stuck for a moment before closing. Is the lever moving as supposed?
You see that the DOF is less in the second and third images, the aperture is more open than the first even if it says 7.1
The lens is a Sigma 70-200 f2.8 HSM .... as you noted, it was set to 7.1 for all three photos in the sequence.
I'm not sure how to check the lens to see if the aperture is stuck for a moment. With an HSM lens, all of the mechanics are inside the lens, so you don't see anything move, correct? Can you provide more guidance on checking to see if the aperature is stuck?
I have used this lens for years now only quite recently with a K-7, and I don't have this issue with that camera body.
Is there a setting that will lock the aperature during a continuous burst?
thanks for replying.