New answers tagged bokeh
6
I'm no expert, but my understanding is that the primary thing that causes bokeh-circles to be sharp is the (apparent) size of the light source. Smaller light-sources will cause sharper bokeh-circles.
To understand why that is, you must first understand what causes bokeh; please see this answer for a detailed explanation.
Once you've read that, it's easy ...
9
It is a property of the lens. the bokeh highlights image not only shape of the aperture, but it also gets a profile. It can be a square profile, have sharp edge and then attenuate, have dots inside it, show cats eye, or be smooth like yours. The way the lens is corrected for spherical aberrations affect this.
Vintage lenses typically make sharp bokeh rings.
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3
The difference appears to be the amount and intensity of light. When you look in the second photo, you can see that there are still very clearly defined (and very sharp) circles, it's just that the majority of them overlap and thus blend together.
In the first image, the circles are more spread out and have more contrast so they appear more "sharp", but ...
1
If only the question was about all smartphone cameras, this example photo would fit in. But, posting it anyway, to show the size of those bokeh balls instead of trying to describe it by mere words. They are quite small, as you can see. Bright ones are made of several overlapping "balls" but some dim ones appear individual. Actually all background blur is ...
1
iPhone 3Gs and laters have the ability called AE/AF Lock (Auto Exposure/Auto Focus Lock) just like on modern DSLRs. Focus on a very close subject by tapping on it on the Camera screen app and hold for 1-2 secs, you will see the focus square pop 3 times and the message AE/AF Lock appear at the bottom of the screen, from now the focus and exposure reading will ...
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