From: Eric Stevens <eric.stevens@sum.co.nz>
Subject: Re: Is there an easy way to stop this light scatter ghosting in all my photos & videos of engine valves?
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From: Eric Stevens <eric.stevens@sum.co.nz>
Newsgroups: rec.photo.digital,rec.video.desktop
Subject: Re: Is there an easy way to stop this light scatter ghosting in all my photos & videos of engine valves?
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On Fri, 15 Dec 2017 06:23:18 -0000 (UTC), Arthur Wood<arthurwood@bimmerfest.com> wrote:

>Eric Stevens wrote:
>
>> I think you mean cams rather than valves.
>> 
>> It looks to me as though the highlighted parts give rise to a strak of
>> light at an angle to the frame of the image. In some of the shots
>> (e.g. bay 10) streaks can be seen emenating from highlights other than
>> the cams. I suspect the problem may be due to a smear on the camera
>> lens. I suggest you try it with another camera.
>
>You are correct in noticing that all the streaks of light are at the same
>45 degree angle no matter how the camera is held.
>
>That's why I think it may be some "physics" principle involved.
>
>There are many other photos taken with the same camera but under daylight
>lighting where these streaks do not happen so it's not the camera.
>
>Some of those photos are here.
>http://www.bimmerfest.com/forums/showthread.php?t=1181089
>
>And here:
>http://www.bimmerfest.com/forums/showthread.php?t=1181289
>
>So it's not the camera or the lens except under those lighting conditions.
>
>I was assuming there is something weird in the physics of the lighting that
>causes those sleet like streaks always at 45 degree angles and far from
>being a mere reflection.

OK. That's one possibility eliminated.
-- 

Regards,

Eric Stevens