If have seen some old Zeiss Lenses there Produces similar swirls Results. On another note, I find the colors being produced by the 58mm f2 Helios to be much more vibrant and contrasty, really nice compared to my 50mm f1.2 ais Nikkor lens. If You really like swirl Circular Background DOF/ Bokeh, You should Test the 50mm F/1.8G Nikon. When I shoot anything with a complex background that's more geometric, like shop lights, street lights or lit up signage, here is no spiral bokeh to be had, at least, not that I've managed to get yet.Īnyone else have an experience like this? Or are there some nice vintage lenses that produce wild spiral bokeh without so much effort? It seems the Biotar does it nicely but second-hand, those things are around one to two thousand $. The background really needs to be a bunch of leaves, trees, grass, or anything complex with a lot of light spots. What I've learned from this experiment is that achieving spiral or spinning bokeh is not as easy as I thought it would be.
The aperture ring has no clicks, it just spins around which is fascinating, I guess it's useful for video. Your Helios is quite famous for it's swirly bokeh (earlier versions may be better for this purpose) however this effect is mostly seen on the edges of the full-frame image circle which will be mostly cropped off when used with a m43 camera. I picked up a very second-hand Helios 58mm f2 with an M42 adapter. Stopping lens down however can decrease swirling bokeh as coma also decreases when stopping the lens down). So lens that's otherwise got ring, donut or heavy onion bokeh can display nervous bokeh under right circumstances (however lens with swirly bokeh will have it regardless if there are any highlights in background or not. But what about the Petzval lens causes that swirly bokeh you see in the background of your shots Sagittal astigmatism causes it But what in the world is that Astigmatism is a lens that causes a subject point radiating away from the center of the frame to appear as a highly stretched oval. fuzzy, double-line shapes (one highlight appears as two).įrom what I remember swirly bokeh is caused by heavy coma combined with vignetting for more pronounced effect, nervous bokeh is caused by spherical aberrations often combined with a non-circular shape of aperture blades - also nervous bokeh tends to appear clearly when there are no highlights in the background - like on the sample I gave you above. Nervous bokeh doesn't have any characteristic shape across whole frame, but individual blobs are not uniform or smooth and don't have any clear, characteristic shape they're more like. Swirly bokeh across the frame got a characteristic circular shape, stronger near the edges. What's the difference between "swirly" bokeh and "nervous" bokeh?
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