Strange cutouts in bokeh

Joined
Jun 3, 2019
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9
I took this picture of my dog Honey (white German Shepherd x 9 yrs old) the other day and noticed some strange cutouts in the bright out of focus areas top-left and to the right of her ear. They look the same shape as the grass and I'm wondering if there was some grass in front of the camera as it was positioned around the same height as the grass. I took some other shots after moving slightly to the side and the cutout effect was gone.

Does anyone know how this occurs and if it was the grass in front of the lens how close would it need to be?

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Thanks,
Andrew
 

Egregius V

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Jun 14, 2015
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Rev. Gregory Vozzo
Normally, bokeh structures get their shape from the lens aperture. You can actually create your own aperture to shape the out-of-focus structures to look like anything. For example: https://www.diyphotography.net/diy_create_your_own_bokeh/

You did have some grass directly in front of your lens, close enough that it was silhouetted through the aperture. That's really interesting.
 

bredman

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Here is an obvious example. The green hue on the left half of the image is the oof grass close to the front element

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