Puzzling Streaks
Oct 30, 2014 21:04:18 #
Hi folks,
Recently I shot some images of a town across the river from where I live. In the attached image there are many short streaks that seem to be random. There are no streaks attached to the many obvious light sources. Camera motion is ruled out because there are obvious structures that are not blurred to the extent that the streaks indicate.
I have about five different but similar shots, all with streaks and I'm pretty sure the streaks are in the same places relative to the objects in the image.
So, can anyone guess/tell me whats happening?
The original was shot with 5DM2 at f/5.6, 8 seconds, ISO 640 with average white balance. The attached is a photoshop generated jpg.
I'm extremely puzzled.
Recently I shot some images of a town across the river from where I live. In the attached image there are many short streaks that seem to be random. There are no streaks attached to the many obvious light sources. Camera motion is ruled out because there are obvious structures that are not blurred to the extent that the streaks indicate.
I have about five different but similar shots, all with streaks and I'm pretty sure the streaks are in the same places relative to the objects in the image.
So, can anyone guess/tell me whats happening?
The original was shot with 5DM2 at f/5.6, 8 seconds, ISO 640 with average white balance. The attached is a photoshop generated jpg.
I'm extremely puzzled.
Oct 30, 2014 21:19:02 #
It was an 8 sec. shot, I believe you had camera moment just long enough to cause the streaks, it doesn't take much.
Oct 30, 2014 21:21:26 #
photo data stripped out. I would suspect camera movement.
Oct 30, 2014 21:26:03 #
Hmmmmm, at 8 sec exposure I'm assuming this was shot w/tripod, so was the image taken through a window, was it raining?
Just a guess.
Just a guess.
Oct 30, 2014 23:13:18 #
ebbote wrote:
It was an 8 sec. shot, I believe you had camera moment just long enough to cause the streaks, it doesn't take much.
lightcatcher wrote:
photo data stripped out. I would suspect camera movement.
BassmanBruce wrote:
Hmmmmm, at 8 sec exposure I'm assuming this was shot w/tripod, so was the image taken through a window, was it raining?
Just a guess.
Just a guess.
As I wrote, I took about six shots aimed at slightly different points and ALL of them have essentially the same streaks at the same places, so it can't be due to the sensor.
And all of them show NO streaks from any of the sources of light.
I used a tripod, it was outside, and not raining.
And, if I recall, I had the mirror locked up.
Oct 30, 2014 23:25:16 #
lighthouse
Loc: No Fixed Abode
Reflection between your UV filter and the lens?
Internal lens reflection?
Dirty filter, dirty lens, lens wiped immediately before taking the shot causing smears?
Internal lens reflection?
Dirty filter, dirty lens, lens wiped immediately before taking the shot causing smears?
Oct 30, 2014 23:32:20 #
lighthouse wrote:
Reflection between your UV filter and the lens?
Internal lens reflection?
Dirty filter, dirty lens, lens wiped immediately before taking the shot causing smears?
Internal lens reflection?
Dirty filter, dirty lens, lens wiped immediately before taking the shot causing smears?
Other very good possibilities since it is not on all of the lights and not star burst effects. Good catch lighthouse I missed it.
Oct 31, 2014 00:08:36 #
ygelman wrote:
Hi folks, br br Recently I shot some images of a... (show quote)
Movement likely caused by hand pressing the shutter button on a less-than-solid tripod.
I suggest using a remote shutter button or at the very least the cameras self timer in this situation.
Oct 31, 2014 00:13:33 #
lighthouse wrote:
Reflection between your UV filter and the lens?
Internal lens reflection?
Dirty filter, dirty lens, lens wiped immediately before taking the shot causing smears?
Internal lens reflection?
Dirty filter, dirty lens, lens wiped immediately before taking the shot causing smears?
It seems to me that if the streaks were due to something on or within the camera itself, then the streaks would appear at the same places on the image, that is, say measured from the edges of the image.
Instead, however, the streaks appear the the same places in the scene. To illustrate, I'm attaching the first image again, and attaching a different image that also shows the streaks. Look, for example, in both images, at the reddish streak "northeast" of the steeple in the foreground.
Object #1
Object #2
Oct 31, 2014 00:21:44 #
MT Shooter wrote:
Movement likely caused by hand pressing the shutter button on a less-than-solid tripod.
I suggest using a remote shutter button or at the very least the cameras self timer in this situation.
I suggest using a remote shutter button or at the very least the cameras self timer in this situation.
Then why is not everything streaked/blurred the same way?
Although I don't think it was due to hand pressing the shutter (I THINK I used the camera's self timer), I'll try to isolate things next time. But it was late at night, just before a lunar eclipse last April, and I don't think I'll be doing that again until Summertime.
Another thing, the length of exposures went from 2 seconds to 8 seconds, and the lengths of the streaks are the same in all the images.
Oct 31, 2014 00:27:21 #
lighthouse
Loc: No Fixed Abode
ygelman wrote:
It seems to me that if the streaks were due to som... (show quote)
No.
Smears and reflections and dirty or fogged equipment light bounces would be in the same places in relation to the light sources, not in relation to the edge of the image frame.
It is easy to trace the light sources to their relevant reflections.
Refer to the associated image.
The brightest points are the reflections you see shifted.
They are shifted about an inch to the left and half an inch up.
The red one is the clue in lining them up, and the grouped ones.
Oct 31, 2014 00:27:24 #
ygelman wrote:
Then why is not everything streaked/blurred the same way?
Although I don't think it was due to hand pressing the shutter (I THINK I used the camera's self timer), I'll try to isolate things next time. But it was late at night, just before a lunar eclipse last April, and I don't think I'll be doing that again until Summertime.
Although I don't think it was due to hand pressing the shutter (I THINK I used the camera's self timer), I'll try to isolate things next time. But it was late at night, just before a lunar eclipse last April, and I don't think I'll be doing that again until Summertime.
It is all streaked the same way, every streak is parallel. This is clearly indicative of camera movement with the shutter open. Every streak is caused by a corresponding point of light, no question about it. Even using mirror up without a remote causes you to have to manually press the shutter button, that will cause movement on anything but the best tripod/head combos.
Oct 31, 2014 00:33:15 #
MT Shooter wrote:
It is all streaked the same way, every streak is parallel. This is clearly indicative of camera movement with the shutter open. Every streak is caused by a corresponding point of light, no question about it. Even using mirror up without a remote causes you to have to manually press the shutter button, that will cause movement on anything but the best tripod/head combos.
Sounds plausible, but still doesn't explain why the other lights don't show streaks.
Oct 31, 2014 00:35:54 #
ygelman wrote:
Sounds plausible, but still doesn't explain why the other lights don't show streaks.
The lights that do not show streaks are simply dimmer lights that were not bright enough to "develop" on the sensor until after longer exposure time. The streaked lights are the brighter lights that streaked upon initial movement.
EDIT: I just noticed you are near the Tappan Zee, my wife was from Nyack.
Oct 31, 2014 00:40:53 #
lighthouse wrote:
No.
Smears and reflections and dirty or fogged equipment light bounces would be in the same places in relation to the light sources, not in relation to the edge of the image frame.
It is easy to trace the light sources to their relevant reflections.
Refer to the associated image.
The brightest points are the reflections you see shifted.
They are shifted about an inch to the left and half an inch up.
Smears and reflections and dirty or fogged equipment light bounces would be in the same places in relation to the light sources, not in relation to the edge of the image frame.
It is easy to trace the light sources to their relevant reflections.
Refer to the associated image.
The brightest points are the reflections you see shifted.
They are shifted about an inch to the left and half an inch up.
Now that is a good argument. But now. . . about the lack of streaks from other points of light???
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