Is there an easy way to stop this light scatter ghosting in all my photos & videos of engine valves?

On 12/15/2017 1:23 AM, Arthur Wood 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.



Yep. See my answer above, and the formula at
https://en.wikipedia.org/wiki/Point_source.






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/sho....php?t=1181089

And he
http://www.bimmerfest.com/forums/sho....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.



--
PeterN

On 12/15/2017 3:56 AM, Eric Stevens wrote:
On Fri, 15 Dec 2017 06:23:18 -0000 (UTC), Arthur Wood
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/sho....php?t=1181089

And he
http://www.bimmerfest.com/forums/sho....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.


I think it's an issue of pint source lighting.

--
PeterN

On Fri, 15 Dec 2017 18:32:33 -0000 (UTC), Arthur Wood
wrote:

Jeff wrote:

The "physics" are because the smudge on the lens is at a 45 degree angle.

It's not a smudge. I don't know what it is, but it's not a smudge.
I wiped the lens because that's the first thing I had thought also.

Anyways, it doesn't happen on pictures that don't have that lighting
situation, even at the same time.

There's something about the lighting combined with the way cameras work.

This is the light fixture that I use as my mobile shop light.
https://www.turboimagehost.com/p/368...ight1.jpg.html

"Image light1.jpg don`t exist on our server!" - which I find
frustrating as I don't know what everyone else is talking about.

I bought it at a yard sale where it was claimed to be a photography light.
Is that a typical photography light?

Currently it has a curly bulb inside a floodlight fixture (PR-something).
What bulb do you normally put in those photography lights?
--

Regards,

Eric Stevens

On 2017-12-16 06:44, Eric Stevens wrote:
On Fri, 15 Dec 2017 18:32:33 -0000 (UTC), Arthur Wood
wrote:



This is the light fixture that I use as my mobile shop light.
https://www.turboimagehost.com/p/368...ight1.jpg.html

"Image light1.jpg don`t exist on our server!" - which I find
frustrating as I don't know what everyone else is talking about.

Works fine here, but it is light1.jpg.html. Just a lamp.

--
Cheers, Carlos.

In article , Carlos E.R.
wrote:

This is the light fixture that I use as my mobile shop light.
https://www.turboimagehost.com/p/368...ight1.jpg.html

"Image light1.jpg don`t exist on our server!" - which I find
frustrating as I don't know what everyone else is talking about.

Works fine here, but it is light1.jpg.html. Just a lamp.

it does now, but it didn't last night when he got the error.

On 2017-12-14 11:48, Arthur Wood wrote:
Is there an easy way to stop this light scatter sparkling in all my photos
& videos of engine valves. What specifically is causing all the ghosting
and sparkling?

I'm using just a shop light and a mobile phone to video (without flash) and
photograph (with and without flash) an engine problem where all the photos
have this shiny glare no matter what angle I put the light or phone with
respect to the valves - and whether or not I use flash.

https://www.turboimagehost.com/p/368..._bay1.jpg.html
https://www.turboimagehost.com/p/368..._bay2.jpg.html
https://www.turboimagehost.com/p/368..._bay3.jpg.html
https://www.turboimagehost.com/p/368..._bay4.jpg.html
https://www.turboimagehost.com/p/368..._bay5.jpg.html
https://www.turboimagehost.com/p/368..._bay6.jpg.html
https://www.turboimagehost.com/p/368..._bay7.jpg.html
https://www.turboimagehost.com/p/368..._bay8.jpg.html
https://www.turboimagehost.com/p/368..._bay9.jpg.html
https://www.turboimagehost.com/p/368...bay10.jpg.html

The original thread is here, where it also contains video with the same
problem, but the photos above show the problem enough.
http://www.bimmerfest.com/forums/showthread.php?t=1181089

Is there an easy way to stop this light scatter ghosting in all my photos &
videos of engine valves.

Haven't read all the replies but my first question would be: is your
lens impeccably clean?