Unexplained Shadow in Photos
Oct 21, 2023 00:11:29 #
timcc
Loc: Virginia
A long shot, but was anyone else standing near you and taking photos at the same time using a flash? If so, it may be your shadow on the wall.
Oct 21, 2023 00:49:36 #
SuperflyTNT wrote:
Well it’s obviously a shadow on the wall and NOT something internal.
Whilst it appears as a 'shadow on the wall' caused by an uneven light source I don't believe that something internal in the lens can be counted out totally, yet.
If we consider the shadow on the wall scenario we have to consider possible light sources, external or 'possibly' flash. If external, e.g. a room light (ceiling/spot/table.lamp) what are the chances of getting the exact same shadow in different locations in the building as confirmed by the Op. Zilch.
jaymatt wrote:
Lens hood, yes. Tripod, no. Exact shadow or whatever in different locations in the same building. Intermittent occurrences. Turned camera off and on between occurrences. Puzzled.
Which brings us to flash, of which the op states was not used but exif states it was. But we all know exif is at times incorrect. Hence my earlier suggestion which was to totally eliminate any ambiguity regarding flash, which you consider a waste of time.
SuperflyTNT wrote:
Some have said stuck aperture blade but that makes... (show quote)
The shot was taken at f/3.5, that is wide open for the lens. Have you seen any information that describes the affect of what a non fully opening blade can have?
Oct 21, 2023 01:47:48 #
Grahame wrote:
The shot was taken at f/3.5, that is wide open for the lens. Have you seen any information that describes the affect of what a non fully opening blade can have?
So if it’s wide open then it couldn’t have stuck. And yes, if you understand how lenses work you cannot get a shadow like that from an aperture blade. It’s a shadow on the wall. And if he was getting that exact shadow every time it’s more indication the flash was firing. The light in the scene also looks like light from a flash.
Also, shooting with and without the flash won’t determine anything unless that strap or whatever caused the shadow is still in the same place.
Oct 21, 2023 03:26:12 #
SuperflyTNT wrote:
So if it’s wide open then it couldn’t have stuck.
I think you'll find I've made no reference to it being "stuck" and my reference to wide open is with respect to 3.5 being what was used which is max for that lens (assuming the exif is correct again).
SuperflyTNT wrote:
And yes, if you understand how lenses work you cannot get a shadow like that from an aperture blade.
If one aperture blade were to be 'loose' and partly hanging in the area e.g. lets say where it would normally be at f/11 wouldn't you see a darker (less exposed) area on the resultant image but still detail of the scene? Loose aperture blades and pics of are often reported and can easily be found on the web, unfortunately I've not found any picture that shows the result.
SuperflyTNT wrote:
It’s a shadow on the wall. And if he was getting that exact shadow every time it’s more indication the flash was firing. The light in the scene also looks like light from a flash.
Yes that is a possibility, but, the Op has stated no flash.
SuperflyTNT wrote:
Also, shooting with and without the flash won’t determine anything unless that strap or whatever caused the shadow is still in the same place.
Did you not understand that taking a shot with and without flash will provide clear evidence of the accuracy and reliability of the exif data pertaining to its use?
Edit, a look at the exif of another image taken by the Op with the same camera and lens where flash was very unlikely to be needed shows 'flash in auto, did not fire'. This suggests exif flash info is likely correct.
Oct 21, 2023 07:15:27 #
This thread matches a common UHH template in which chaos ensues due to asigning undue credence to a users description of the process of making the pix in question.
Oct 21, 2023 07:41:54 #
You know, of course, that there is no answer to this question, unfortunately. 😟
Oct 21, 2023 08:04:06 #
jerryc41 wrote:
You know, of course, that there is no answer to this question, unfortunately. 😟
How is that unfortunate ?!? Our UHH Sacred Tradition and Practice has been upheld, and that is all that really matters. Excelsior !
Oct 21, 2023 08:12:42 #
User ID wrote:
How is that unfortunate ?!? Our UHH Sacred Tradition and Practice has been upheld, and that is all that really matters. Excelsior !
I don't like lingering questions. Every question must have a valid answer.
Oct 21, 2023 08:14:49 #
The OP still hasn't told us what the light source was if it wasn't a flash. That could provide a clue to what happened.
Oct 21, 2023 08:15:13 #
User ID wrote:
This thread matches a common UHH template in which chaos ensues due to asigning undue credence to a users description of the process of making the pix in question.
LOL - I didn't create a tally, but it does seem the other UHH tradition is evident in the majority of the replies: blame the equipment for any problems.
Oct 21, 2023 08:17:30 #
JohnSwanda wrote:
The OP still hasn't told us what the light source was if it wasn't a flash. That could provide a clue to what happened.
There's even an argument between the humans and the probably completely innocent camera, a camera who reports in the EXIF a flash actually fired ....
Oct 21, 2023 08:48:30 #
CHG_CANON wrote:
There's even an argument between the humans and the probably completely innocent camera, a camera who reports in the EXIF a flash actually fired ....
Pretty good odds even for a non-bettor.
Oct 21, 2023 10:12:28 #
jerryc41 wrote:
I don't like lingering questions. Every question must have a valid answer.
Not every posted query is an actually valid question. Only a valid question can possibly have a valid answer. Often as not, puzzled Hawgsters seeking solutions will fail to ask really valid questions.
Oct 21, 2023 10:28:39 #
User ID wrote:
Not every posted query is an actually valid question. Only a valid question can possibly have a valid answer. Often as not, puzzled Hawgsters seeking solutions will fail to ask really valid questions.
Exactly.
Example: I seem to be doing something wrong. When I look at several images, I'm finding an unexplained shadow on the wall of my images, such as this example. I don't remember using the flash, but the camera EXIF says I did. What ideas might I consider while I investigate and consider how I caused this shadow?
Oct 21, 2023 10:44:44 #
larryepage
Loc: North Texas area
Grahame wrote:
The shot was taken at f/3.5, that is wide open for the lens. Have you seen any information that describes the affect of what a non fully opening blade can have?
If a loose iris blade (or a rogue ribbon cable) is causing a problem at a wide open aperture, it would be a simple task to look into the lens and see if there is something visible in the light path.
Folks...this is all rudimentary diagnostic troubleshooting. It's part of life, not just photography. And for it to work, you have to be open to the evidence supporting a reality that may be different from your initial presumption.
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