Grateful any thoughts on what is causing the vertical wavy bokeh in the top right-hand corner of this photo (and others in a batch) please. Electonic shutter?

Some repeating vertical OOF objects. Any chance this was shot through some fence?

leorimkus wrote:Some repeating vertical OOF objects. Any chance this was shot through some fence?Thanks but nope!

stevevp wrote:Grateful any thoughts on what is causing the vertical wavy bokeh in the top right-hand corner of this photo (and others in a batch) please. Electonic shutter?I would guess its some odd occurrence between E-shutter and IS. It looks like motion blur but the bird is not blurry.

And here's another but left side:

tammons wrote:stevevp wrote:Grateful any thoughts on what is causing the vertical wavy bokeh in the top right-hand corner of this photo (and others in a batch) please. Electonic shutter?I would guess its some odd occurrence between E-shutter and IS. It looks like motion blur but the bird is not blurry.And the wavy bit doesn't seem to extend through the stones.

stevevp wrote:tammons wrote:stevevp wrote:Grateful any thoughts on what is causing the vertical wavy bokeh in the top right-hand corner of this photo (and others in a batch) please. Electonic shutter?I would guess its some odd occurrence between E-shutter and IS. It looks like motion blur but the bird is not blurry.And the wavy bit doesn't seem to extend through the stones.Look more closely at the second image - the wavy bit certainly does extend part way through the stone. The stripes are narrower because the stone was not so much out of focus as the more distant background.I would say (with about 95% certainty) that it is due to some narrow vertical object fairly close to the camera and in the field of view.  The object will be so much out of focus that it is not visible in the image, but it will still affect the bokeh.You probably don't believe me, so try it for yourself.  Use that same lens at full aperture and while you are taking the shot, stick one finger in front of the lens.  If your finger is vertical, the bokeh will have wavy vertical stripes.  If your finger is horizontal, the bokeh will have wavy horizontal stripes.With a long lens such as your 300mm, the finger or other object will still have the same effect even if it is a few feet from the camera, but then the effect will not extend across the whole frame.  It could be a twig or something like that, that was hanging into your field of view.

stevevp wrote:And here's another but left side:The Wavy background is caused by distinct lines that are out of focus. They are duplicated creating the multiple verticals. This is a characteristic of many very sharp telephoto lenses when the lines are at a specific distance behind the focus point. They are too far for good focus and too close for a smooth out of focus background.It occurs with all three of my long telephoto lenses, but is most obvious with my 300mm f4.Attached is a very good (that is bad) example

stevevp wrote:Grateful any thoughts on what is causing the vertical wavy bokeh in the top right-hand corner of this photo (and others in a batch) please. Electonic shutter?Does the OM-1 still call Noise Reduction, Noise Filter? If so,You are at ISO 8000. What is your NoiseReductionFilter set to? If this location is readily available to you, could you try a lower ISO shot from the same location?

stevevp wrote:And here's another but left side:I dont think this is purely a weird bokeh due to an OOF objects distance. Else it wouldnt extend down into the rock. And the OOF objects are the wrong shape. IMO it has to be the camera and or lens. Maybe check the camera and lens FW and reset the camera and try it again.

tammons wrote:I dont think this is purely a weird bokeh due to an OOF objects distance. Else it wouldnt extend down into the rock. And the OOF objects are the wrong shape. IMO it has to be the camera and or lens. Maybe check the camera and lens FW and reset the camera and try it again.Firmware can't affect bokeh in any way. This is pure optical thing. Seen this many times, especially with Nikkor 85/1.8D - typically on tree branches. Also similar effect is very obvious when shooting through wire net fence. It is kind of interference between OOF images - at some points two OOF parts amplify each other. Unsharp mask sharpening uses same principle.

I'm in a photo critique group with some brilliant and very experienced photographers. We occasionally see this weird effects like this from all makes of cameras and lenses.Although sometimes we can identify the cause, there are times when we are totally puzzled.These effects are usually caused by out of focus background or foreground vertical, or patterned objects. Some not at all visible.

leorimkus wrote:tammons wrote:I dont think this is purely a weird bokeh due to an OOF objects distance. Else it wouldnt extend down into the rock. And the OOF objects are the wrong shape. IMO it has to be the camera and or lens. Maybe check the camera and lens FW and reset the camera and try it again.Firmware can't affect bokeh in any way. This is pure optical thing. Seen this many times, especially with Nikkor 85/1.8D - typically on tree branches. Also similar effect is very obvious when shooting through wire net fence. It is kind of interference between OOF images - at some points two OOF parts amplify each other. Unsharp mask sharpening uses same principle.FW can affect sync IS.

stevevp wrote:And here's another but left side:What was the temperature when you took this photo?

tammons wrote:FW can affect sync IS.And how will it affect bokeh? Any impact I can imagine would affect whole image, not only parts of bokeh. Influence could be if firmware automatically switches between EFCS and fully electronic shutter - but the cause would be EFCS.Anyways - I could find loads of similar bokeh examples where explanation for it is pretty obvious, not involving any software glitches.

BTW such artifacts are more common with lenses known for "bad", "nervous" bokeh.

leorimkus wrote:BTW such artifacts are more common with lenses known for "bad", "nervous" bokeh.I am aware. But in the last photo he posted, the rock has vertical waves.

Wow, thanks for all the replies.Whilst I can exclude the photos being taken through a vertical fence, I can't exclude a vertical twig being in the way.As for temperature, it was mid-February in Boquete, in the cool highlands in Panama and I'm guessing at that time of the morning it was about 10 centigrade. We certainly needed a light fleece outdoors.Unfortunately I am now home (and working my way through ~10k photos) so cannot repeat with a lower ISO.If I come across more examples but taken in a different location I will post them up.

I've seen such weird bokeh caused by filters (eg. glass filter intended as lens protection), mostly on teles.Easy to test by removing the filter.HTH

finnan haddie wrote:I've seen such weird bokeh caused by filters (eg. glass filter intended as lens protection), mostly on teles.Easy to test by removing the filter.HTHMany thanks, but I never use a filter, always use a lens-hood.