Questions tagged [cats-eye-bokeh]

Out of focus bokeh balls shaped like an oval, football, or "cat's eye".

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0answers
50 views

What creates a calisson-like shaped light bokeh ? How to craft this aspect of the bokeh? [duplicate]

What creates a calisson-like shaped light bokeh such as this one (made with Arri signature T/1.9) ? The further from the center the more present are the angles, why ? Another lens (Zeiss Supreme T/1....
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3answers
222 views

In photo taken with a prime lens, what is the cause of the “zoomed” bokeh appearance?

This image was taken with a Vivitar 24/2 (Kiron) prime lens. The lens is sharp. The focal plane is reasonably flat, and there is barrel distortion. The bokeh balls have an oval shape in which the ...
1
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1answer
158 views

How wide does the front element of a lens have to be, given the focal length and the aperture?

Clearly, a lens with focal length F and aperture 1/f has to be at least F/f mm wide. Maybe a little more to accommodate the angle of view. However, lenses tend to have wider front elements than F/f. ...
1
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1answer
279 views

What causes this 'bokeh crop' effect?

I've seen this effect before & not thought much about it, but I was trying out some experiments with a string of xmas lights & short DoF & noticed that sometimes I can get circular bokeh ...
4
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2answers
2k views

How to prevent “cats eye” bokeh?

What steps could someone take in order to keep their bokeh balls as circular as possible? I know stepping down the lens aperture will help. Are there any other suggestions? Would using the lens hood ...
2
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2answers
975 views

What exactly is this light artifact/flare?

I have an old SMC Pentax-F 50mm F1.7 that I like to use with an adapter on my APS-C camera for portraits. It looks great, even though it has somewhat heavy CAs at f/1,7. On some backlit portraits, I ...
3
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2answers
468 views

How can I take pictures with extreme bokeh with an in-focus subject nearby?

How is that possible to make this type of picture, once his face is close to the christmas lights and all huge without focus. I tried f/2.8 with a 50 mm but with both lights and face next to each ...
16
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2answers
1k views

Clipped bokeh circles at max aperture with wide aperture, short focal length lenses

I recently purchased a Sigma 30mm f/1.4 lens for my Canon 450D and noticed soon that at least wide open, any bokeh circles in the lower half of an image (in landscape orientation) seem to have their ...