Unexplained Shadow in Photos
Oct 20, 2023 16:47:37 #
Oct 20, 2023 16:50:14 #
jaymatt wrote:
Can anyone explain the dark shadow in the upper left of this photo? This happened intermittently while taking photos indoors last weekend. It just seemed to start and stop at will, and did not happen outdoors. And no, I did not have my finger in front of the lens. 
Sony a6000 w/ 16-50 lens, no flash, and a lens hood.
Sony a6000 w/ 16-50 lens, no flash, and a lens hood.
Wouldn't a shadow on a wall be as in future cusvas what else is on the wall.
Oct 20, 2023 16:57:28 #
larryepage
Loc: North Texas area
Mark Sturtevant wrote:
Could it be an aperture blade hanging in the lens?
It's possible. But right now the symptoms we can see don't really match the narrative from the OP. There is a need to do a little bit of controlled troubleshooting to resolve the conflicting information. Hardware failure is usually the least likely cause.
Oct 20, 2023 17:02:18 #
Oct 20, 2023 17:07:28 #
toxdoc42 wrote:
Wouldn't a shadow on a wall be as in future cusvas what else is on the wall.
I guess that's a typo, but I can't figure out what word "cusvas" is supposed to be.
Oct 20, 2023 17:07:35 #
toxdoc42 wrote:
Wouldn't a shadow on a wall be as in future cusvas what else is on the wall.
Nope. No vascus involved.
Oct 20, 2023 17:10:59 #
SuperflyTNT wrote:
Sounds like a way to waste time.
What you may consider a "waste of time", to some others will be the obvious way to alleviate the questions and suggestions regarding flash use.
Not only, will the visual results with or without flash be obvious, the corresponding exif (observed by some) will categorically demonstrate the correctness of the flash use data within it.
When you are getting nowhere fault/cause finding, elimination is a basic procedure.
Oct 20, 2023 17:22:51 #
Oct 20, 2023 17:27:08 #
toxdoc42 wrote:
Wouldn't the edge of the shadow be in focus on the wall.
That depends on how far away from the light source the object throwing the shadow is, and how large the light source is.
Oct 20, 2023 18:03:47 #
First off. Don’t take pics of clowns. It freaks me out. They’re Wiley and smell like cabbage. (I borrowed that last line.)
Another borrowed line: “Watson, it is a capitol mistake to theorize unless one has data. Insensibly one will twist facts to suit theories instead of theories to suit facts.” Sherlock Holmes.
So get some facts.
Come up with a series of steps, using the same gear, in an attempt to replicate the problem. Do it incrementally but with same settings.
Maybe hand held, hand held with flash, hand held with lens hood and possibly more. Then repeat using a tripod. In other words eliminate the variables that
Might be causing this. It might be a fun exercise. Report back to the team here.
And do us all a favor. Skip the clown picks. Gives me the Willies. :).
Another borrowed line: “Watson, it is a capitol mistake to theorize unless one has data. Insensibly one will twist facts to suit theories instead of theories to suit facts.” Sherlock Holmes.
So get some facts.
Come up with a series of steps, using the same gear, in an attempt to replicate the problem. Do it incrementally but with same settings.
Maybe hand held, hand held with flash, hand held with lens hood and possibly more. Then repeat using a tripod. In other words eliminate the variables that
Might be causing this. It might be a fun exercise. Report back to the team here.
And do us all a favor. Skip the clown picks. Gives me the Willies. :).
Oct 20, 2023 18:07:59 #
Oct 20, 2023 18:10:50 #
billnikon
Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
JohnSwanda wrote:
if the EXIF is wrong and there was no flash, then what was the light source? It has to be directional enough to make a sharp shadow.
A lamp, a Colman lantern, a flash light, a ceiling light, candle light, ceiling spot, down light, meteor strike, lightening. All of one of the preceding.
Oct 20, 2023 18:43:25 #
JohnSwanda wrote:
I guess that's a typo, but I can't figure out what word "cusvas" is supposed to be.
Seems to have some connection to "in future".
Oct 20, 2023 23:26:53 #
User ID wrote:
Seems to have some connection to "in future".
It’s supposed to be “vascus”, Latin, basically meaning “askew”.
Oct 20, 2023 23:43:45 #
Grahame wrote:
What you may consider a "waste of time", to some others will be the obvious way to alleviate the questions and suggestions regarding flash use.
Not only, will the visual results with or without flash be obvious, the corresponding exif (observed by some) will categorically demonstrate the correctness of the flash use data within it.
When you are getting nowhere fault/cause finding, elimination is a basic procedure.
Not only, will the visual results with or without flash be obvious, the corresponding exif (observed by some) will categorically demonstrate the correctness of the flash use data within it.
When you are getting nowhere fault/cause finding, elimination is a basic procedure.
Well it’s obviously a shadow on the wall and NOT something internal. Some have said stuck aperture blade but that makes no sense at all. First of all, if there was an aperture blade stuck out during exposure it wouldn’t look like that. If that were the case closing the aperture down would cast shadows instead of just affecting exposure. A stuck blade might have a slight effect on exposure and change the shape of the bokeh. But just looking at how a lens works it’s not possible. When you’re looking through the viewfinder, framing and focusing the shot, the lens is wide open. When he presses the shutter the aperture closes down to the proper setting before the shutter fires. If it was a stuck aperture blade it would be stuck open, not closed.
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