I think all of the replies contained part of the problem. Thank you for that.
@ Oroboros: I moved the camera up and it helped.
@ David Brinnen: I did play around with the Depth of Field, although I think the posted image was with the default setting. I will definitely look at your video (and your other videos too).
@ Horo: You are right that it is picture material. I don’t know what procedural means - I still have to learn that. But I did change the texture to a higher quality picture and also increased the frequency, and it helped.