What causes these 'bulls-eyes' in my image?

Started 1 month ago | Discussions thread
ForumParentFirstPrevious
Flat view
Michael Floyd Contributing Member • Posts: 976
What causes these 'bulls-eyes' in my image?

Ok, so at the opposite end of the scale to the lovely GF lenses is my homemade body cap pinhole that I've been playing around with a bit lately. Below is an 800-ish pixel square crop out of the frame, so a small portion of the frame but by no means tiny. These little bulls-eyes are clearly visible. No doubt they are brought to light by the extremely narrow aperture of the pinhole as there is zero trace of anything similar at any half normal aperture.

I'm thinking this oddity in my pinhole images is something like sensor dust, perhaps this is how it looks on the GFX with the distant sensor cover glass? I have cleaned my sensor with no change so perhaps there is something else causing this, or perhaps my cleaning regime was not thorough enough.

Any thoughts or experience with such a thing from anybody? There's about a dozen of them spread randomly over the frame.

ForumParentFirstPrevious
Flat view
ForumParentFirstPrevious
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow