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<blockquote data-quote="Stoshowicz" data-source="post: 369479" data-attributes="member: 31397">Well , you may be exactly correct , about the cause of the wingtip blur ,, its very difficult to say conclusively otherwise - I was making a rough approximation , that the lower wing is really pretty much in the field of decent focus because its roughly at the same distance as the tail and face,, and that the wing was pivoting basically toward or away from the sensor rather than overall down or up.So the distribution of the blur was the main thing suggesting to me a vertical bias for smudge. I dont know if feather edges flutter at some high frequency, thats an interesting possibility.&nbsp;I'm trying to rule issues out so as to do better. I google to try to find discussion on fine scale artifacts that show up on moving objects but couldn't find much.They say you cant really freeze action completely with shutter speed and Im seeing some confirmation of that. But when you go to use a strobe, the distance makes the effect weak and the ambient light shows the ghost of motion superimposed on the flash image ( if you know what I mean)</blockquote>

[QUOTE="Stoshowicz, post: 369479, member: 31397"] Well , you [I]may[/I] be exactly correct , about the cause of the wingtip blur ,, its very difficult to say conclusively otherwise - I was making a rough approximation , that the lower wing is really pretty much in the field of decent focus because its roughly at the same distance as the tail and face,, and that the wing was pivoting basically toward or away from the sensor rather than overall down or up. So the distribution of the blur was the main thing suggesting to me a vertical bias for smudge. I dont know if feather edges flutter at some high frequency, thats an interesting possibility. I'm trying to rule issues out so as to do better. I google to try to find discussion on fine scale artifacts that show up on moving objects but couldn't find much. They say you cant really freeze action completely with shutter speed and Im seeing some confirmation of that. But when you go to use a strobe, the distance makes the effect weak and the ambient light shows the ghost of motion superimposed on the flash image ( if you know what I mean) [/QUOTE]

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