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Is this lightning image a natural phenomena or a digital camera artifact?
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up vote
1
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This image was taken during a thunderstorm and I am trying to find an explanation for it. My guess is that it is a digital artifact because the digital camera's mechanisms for reading pixels data from CCD sensor and the delay associated with reading and storing each frame. So, I am wondering wether my guess is correct
What is the scientific explanation of this lightning image?
Here is a link to a video clip that contains the image https://mobile.twitter.com/307Mod/status/1045366144838717440/video/1
digital lightning
asked 3 hours ago
Mohammad Al-Turkistany
1062
New contributor
Mohammad Al-Turkistany is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |Â
up vote
1
down vote
favorite
This image was taken during a thunderstorm and I am trying to find an explanation for it. My guess is that it is a digital artifact because the digital camera's mechanisms for reading pixels data from CCD sensor and the delay associated with reading and storing each frame. So, I am wondering wether my guess is correct
What is the scientific explanation of this lightning image?
Here is a link to a video clip that contains the image https://mobile.twitter.com/307Mod/status/1045366144838717440/video/1
digital lightning
asked 3 hours ago
Mohammad Al-Turkistany
1062
New contributor
Mohammad Al-Turkistany is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Is this a still frame extracted from a video?
– mattdm
3 hours ago
@mattdm Yes, According to the owner.
– Mohammad Al-Turkistany
3 hours ago
Although some similar things affect photography, given that you're specifically interested in video this is likely better at video.stackexchange.com
– mattdm
3 hours ago
1
actually it is not a video frame. the linked video shows a smartphone app reviewing a series of photos taken in the burst mode. so even if the picture is extracted from a video, it is still a photo, taken in a photo capture mode. of course, smartphone means electronic shutter, so it's similar to what "serious" cameras do in video mode.
– szulat
1 hour ago
@szulat Yes, I think you are right. The resolution is much better than a video frame.
– Mohammad Al-Turkistany
1 hour ago
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
This image was taken during a thunderstorm and I am trying to find an explanation for it. My guess is that it is a digital artifact because the digital camera's mechanisms for reading pixels data from CCD sensor and the delay associated with reading and storing each frame. So, I am wondering wether my guess is correct
What is the scientific explanation of this lightning image?
Here is a link to a video clip that contains the image https://mobile.twitter.com/307Mod/status/1045366144838717440/video/1
digital lightning
asked 3 hours ago
Mohammad Al-Turkistany
1062
New contributor
Mohammad Al-Turkistany is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
This image was taken during a thunderstorm and I am trying to find an explanation for it. My guess is that it is a digital artifact because the digital camera's mechanisms for reading pixels data from CCD sensor and the delay associated with reading and storing each frame. So, I am wondering wether my guess is correct
What is the scientific explanation of this lightning image?
Here is a link to a video clip that contains the image https://mobile.twitter.com/307Mod/status/1045366144838717440/video/1
digital lightning
digital lightning
asked 3 hours ago
Mohammad Al-Turkistany
1062
New contributor
Mohammad Al-Turkistany is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
Mohammad Al-Turkistany
1062
New contributor
Mohammad Al-Turkistany is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
Mohammad Al-Turkistany
1062
New contributor
Mohammad Al-Turkistany is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
Mohammad Al-Turkistany
1062
asked 3 hours ago
Mohammad Al-Turkistany
1062
1062
New contributor
Mohammad Al-Turkistany is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Mohammad Al-Turkistany is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Mohammad Al-Turkistany is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Is this a still frame extracted from a video?
– mattdm
3 hours ago
@mattdm Yes, According to the owner.
– Mohammad Al-Turkistany
3 hours ago
Although some similar things affect photography, given that you're specifically interested in video this is likely better at video.stackexchange.com
– mattdm
3 hours ago
1
actually it is not a video frame. the linked video shows a smartphone app reviewing a series of photos taken in the burst mode. so even if the picture is extracted from a video, it is still a photo, taken in a photo capture mode. of course, smartphone means electronic shutter, so it's similar to what "serious" cameras do in video mode.
– szulat
1 hour ago
@szulat Yes, I think you are right. The resolution is much better than a video frame.
– Mohammad Al-Turkistany
1 hour ago
add a comment |Â
Is this a still frame extracted from a video?
– mattdm
3 hours ago
@mattdm Yes, According to the owner.
– Mohammad Al-Turkistany
3 hours ago
Although some similar things affect photography, given that you're specifically interested in video this is likely better at video.stackexchange.com
– mattdm
3 hours ago
1
actually it is not a video frame. the linked video shows a smartphone app reviewing a series of photos taken in the burst mode. so even if the picture is extracted from a video, it is still a photo, taken in a photo capture mode. of course, smartphone means electronic shutter, so it's similar to what "serious" cameras do in video mode.
– szulat
1 hour ago
@szulat Yes, I think you are right. The resolution is much better than a video frame.
– Mohammad Al-Turkistany
1 hour ago
Is this a still frame extracted from a video?
– mattdm
3 hours ago
Is this a still frame extracted from a video?
– mattdm
3 hours ago
@mattdm Yes, According to the owner.
– Mohammad Al-Turkistany
3 hours ago
@mattdm Yes, According to the owner.
– Mohammad Al-Turkistany
3 hours ago
Although some similar things affect photography, given that you're specifically interested in video this is likely better at video.stackexchange.com
– mattdm
3 hours ago
Although some similar things affect photography, given that you're specifically interested in video this is likely better at video.stackexchange.com
– mattdm
3 hours ago
1
1
actually it is not a video frame. the linked video shows a smartphone app reviewing a series of photos taken in the burst mode. so even if the picture is extracted from a video, it is still a photo, taken in a photo capture mode. of course, smartphone means electronic shutter, so it's similar to what "serious" cameras do in video mode.
– szulat
1 hour ago
actually it is not a video frame. the linked video shows a smartphone app reviewing a series of photos taken in the burst mode. so even if the picture is extracted from a video, it is still a photo, taken in a photo capture mode. of course, smartphone means electronic shutter, so it's similar to what "serious" cameras do in video mode.
– szulat
1 hour ago
@szulat Yes, I think you are right. The resolution is much better than a video frame.
– Mohammad Al-Turkistany
1 hour ago
@szulat Yes, I think you are right. The resolution is much better than a video frame.
– Mohammad Al-Turkistany
1 hour ago
add a comment |Â
3 Answers
3
active
oldest
votes
up vote
4
down vote
Cameras design utilizes several different shutter designs. The DSLR (Digital Single Lens Reflex) typically use a focal plane shutter design. Such a shutter is favored when the camera supports interchangeable lenses. This is because the shutter resides at the rear of camera body; it hovers just above the surface of the image sensor. This design features a curtain with a slit. When the shutter button is actuated, the curtain with its slit opening travels across the image sensor. The shutter speed is the clock time it takes to travel the width of the slit. In other words, if the shutter speed is set to 1/125 of second, the curtain moves 1 slit width in 1/125 of a second. If the shutter speed is set faster, the width of the slit is set narrower, if the shutter speed is set slower, the slit width is set wider.
In my opinion, this image was taken during a lightning flash. The blitz of light produced by lightening can be quite short (milliseconds). I think the shutter speed was set fast and as fortune happened, the blitz caught the lighting flash as the shutter was in motion. The part of sensor uncovered, recorded an image that was well exposed. Part of the slit travel exposed the sensor without the benefit of the lightning blitz, this region of the chip is under-exposed. We see this happen all the time when the photographer is using an electronic flash. If the blitz of the flash and the shutter slit motion are not synchronized, we get this effect. Let me add, it’s not easy, perhaps impossible, to synchronized a shutter with a lightening flash.
answered 2 hours ago
Alan Marcus
23.2k12654
Nice catch, Alan.
– Stan
1 hour ago
add a comment |Â
up vote
1
down vote
Looks like the rolling shutter effect, which is more pronounced in (but not limited to) the video mode.
Like you suspected, the effect is caused by different parts of the image being captured at slightly different times. Electronic shutters (used in the video mode) are currently about 10 times slower than mechanical shutter, which means more chance for dramatic changes in the frame during the exposure.
Google search for "lightning rolling shutter" reveales interesting examples.
answered 2 hours ago
szulat
3,42811025
It takes approximately 2-4 milliseconds for a typical mechanical shutter curtain to transit a APS-C or FF sensor. Are you saying the fastest electronic shutters require 20-40 milliseconds to do a single readout? That's 1/50 to 1/25 seconds. How would 60 fps or 120 fps be possible at such slow speeds?
– Michael Clark
1 hour ago
they are simply not possible ;-) at full resolution. even some new cameras from top manufacturers don't support 4K video recording! but of course things are getting better each year...
– szulat
1 hour ago
oh, and i mean typical electronic shutters, not the fastest ones. sony A9 seems to be well ahead of the competition here (but still slower than mechanical). and of course it would be nice to see a global shutter consumer camera some day...
– szulat
1 hour ago
add a comment |Â
up vote
-1
down vote
I appears to be an image from a camera with a built-in neutral density (ND) filter, that was caught in mid-transition between filter and no-filter (or vice versa).
The transition line appears to be a all-or-none ND filter, which is not typical of most photographic graduated ND filters. Photographic ND grads have a transition region of a certain width, described as various forms of "soft ND grad" or "hard ND grad". This is because a stark transition would look bad, and virtually impossible to blend into the scene (such as here).
But several video cameras have built-in on/off ND filters, that rotate between the clear (no filter) and ND filtered regions. This just appears to be a single frame of a video where the filter was transitioning between "on" and "off" (or again, possibly vice-versa).
answered 2 hours ago
scottbb
17.7k75185
add a comment |Â
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
4
down vote
Cameras design utilizes several different shutter designs. The DSLR (Digital Single Lens Reflex) typically use a focal plane shutter design. Such a shutter is favored when the camera supports interchangeable lenses. This is because the shutter resides at the rear of camera body; it hovers just above the surface of the image sensor. This design features a curtain with a slit. When the shutter button is actuated, the curtain with its slit opening travels across the image sensor. The shutter speed is the clock time it takes to travel the width of the slit. In other words, if the shutter speed is set to 1/125 of second, the curtain moves 1 slit width in 1/125 of a second. If the shutter speed is set faster, the width of the slit is set narrower, if the shutter speed is set slower, the slit width is set wider.
In my opinion, this image was taken during a lightning flash. The blitz of light produced by lightening can be quite short (milliseconds). I think the shutter speed was set fast and as fortune happened, the blitz caught the lighting flash as the shutter was in motion. The part of sensor uncovered, recorded an image that was well exposed. Part of the slit travel exposed the sensor without the benefit of the lightning blitz, this region of the chip is under-exposed. We see this happen all the time when the photographer is using an electronic flash. If the blitz of the flash and the shutter slit motion are not synchronized, we get this effect. Let me add, it’s not easy, perhaps impossible, to synchronized a shutter with a lightening flash.
answered 2 hours ago
Alan Marcus
23.2k12654
Nice catch, Alan.
– Stan
1 hour ago
add a comment |Â
up vote
4
down vote
Cameras design utilizes several different shutter designs. The DSLR (Digital Single Lens Reflex) typically use a focal plane shutter design. Such a shutter is favored when the camera supports interchangeable lenses. This is because the shutter resides at the rear of camera body; it hovers just above the surface of the image sensor. This design features a curtain with a slit. When the shutter button is actuated, the curtain with its slit opening travels across the image sensor. The shutter speed is the clock time it takes to travel the width of the slit. In other words, if the shutter speed is set to 1/125 of second, the curtain moves 1 slit width in 1/125 of a second. If the shutter speed is set faster, the width of the slit is set narrower, if the shutter speed is set slower, the slit width is set wider.
In my opinion, this image was taken during a lightning flash. The blitz of light produced by lightening can be quite short (milliseconds). I think the shutter speed was set fast and as fortune happened, the blitz caught the lighting flash as the shutter was in motion. The part of sensor uncovered, recorded an image that was well exposed. Part of the slit travel exposed the sensor without the benefit of the lightning blitz, this region of the chip is under-exposed. We see this happen all the time when the photographer is using an electronic flash. If the blitz of the flash and the shutter slit motion are not synchronized, we get this effect. Let me add, it’s not easy, perhaps impossible, to synchronized a shutter with a lightening flash.
answered 2 hours ago
Alan Marcus
23.2k12654
Nice catch, Alan.
– Stan
1 hour ago
add a comment |Â
up vote
4
down vote
up vote
4
down vote
Cameras design utilizes several different shutter designs. The DSLR (Digital Single Lens Reflex) typically use a focal plane shutter design. Such a shutter is favored when the camera supports interchangeable lenses. This is because the shutter resides at the rear of camera body; it hovers just above the surface of the image sensor. This design features a curtain with a slit. When the shutter button is actuated, the curtain with its slit opening travels across the image sensor. The shutter speed is the clock time it takes to travel the width of the slit. In other words, if the shutter speed is set to 1/125 of second, the curtain moves 1 slit width in 1/125 of a second. If the shutter speed is set faster, the width of the slit is set narrower, if the shutter speed is set slower, the slit width is set wider.
In my opinion, this image was taken during a lightning flash. The blitz of light produced by lightening can be quite short (milliseconds). I think the shutter speed was set fast and as fortune happened, the blitz caught the lighting flash as the shutter was in motion. The part of sensor uncovered, recorded an image that was well exposed. Part of the slit travel exposed the sensor without the benefit of the lightning blitz, this region of the chip is under-exposed. We see this happen all the time when the photographer is using an electronic flash. If the blitz of the flash and the shutter slit motion are not synchronized, we get this effect. Let me add, it’s not easy, perhaps impossible, to synchronized a shutter with a lightening flash.
answered 2 hours ago
Alan Marcus
23.2k12654
Cameras design utilizes several different shutter designs. The DSLR (Digital Single Lens Reflex) typically use a focal plane shutter design. Such a shutter is favored when the camera supports interchangeable lenses. This is because the shutter resides at the rear of camera body; it hovers just above the surface of the image sensor. This design features a curtain with a slit. When the shutter button is actuated, the curtain with its slit opening travels across the image sensor. The shutter speed is the clock time it takes to travel the width of the slit. In other words, if the shutter speed is set to 1/125 of second, the curtain moves 1 slit width in 1/125 of a second. If the shutter speed is set faster, the width of the slit is set narrower, if the shutter speed is set slower, the slit width is set wider.
In my opinion, this image was taken during a lightning flash. The blitz of light produced by lightening can be quite short (milliseconds). I think the shutter speed was set fast and as fortune happened, the blitz caught the lighting flash as the shutter was in motion. The part of sensor uncovered, recorded an image that was well exposed. Part of the slit travel exposed the sensor without the benefit of the lightning blitz, this region of the chip is under-exposed. We see this happen all the time when the photographer is using an electronic flash. If the blitz of the flash and the shutter slit motion are not synchronized, we get this effect. Let me add, it’s not easy, perhaps impossible, to synchronized a shutter with a lightening flash.
answered 2 hours ago
Alan Marcus
23.2k12654
answered 2 hours ago
Alan Marcus
23.2k12654
answered 2 hours ago
Alan Marcus
23.2k12654
answered 2 hours ago
Alan Marcus
23.2k12654
23.2k12654
Nice catch, Alan.
– Stan
1 hour ago
add a comment |Â
Nice catch, Alan.
– Stan
1 hour ago
Nice catch, Alan.
– Stan
1 hour ago
Nice catch, Alan.
– Stan
1 hour ago
add a comment |Â
up vote
1
down vote
Looks like the rolling shutter effect, which is more pronounced in (but not limited to) the video mode.
Like you suspected, the effect is caused by different parts of the image being captured at slightly different times. Electronic shutters (used in the video mode) are currently about 10 times slower than mechanical shutter, which means more chance for dramatic changes in the frame during the exposure.
Google search for "lightning rolling shutter" reveales interesting examples.
answered 2 hours ago
szulat
3,42811025
It takes approximately 2-4 milliseconds for a typical mechanical shutter curtain to transit a APS-C or FF sensor. Are you saying the fastest electronic shutters require 20-40 milliseconds to do a single readout? That's 1/50 to 1/25 seconds. How would 60 fps or 120 fps be possible at such slow speeds?
– Michael Clark
1 hour ago
they are simply not possible ;-) at full resolution. even some new cameras from top manufacturers don't support 4K video recording! but of course things are getting better each year...
– szulat
1 hour ago
oh, and i mean typical electronic shutters, not the fastest ones. sony A9 seems to be well ahead of the competition here (but still slower than mechanical). and of course it would be nice to see a global shutter consumer camera some day...
– szulat
1 hour ago
add a comment |Â
up vote
1
down vote
Looks like the rolling shutter effect, which is more pronounced in (but not limited to) the video mode.
Like you suspected, the effect is caused by different parts of the image being captured at slightly different times. Electronic shutters (used in the video mode) are currently about 10 times slower than mechanical shutter, which means more chance for dramatic changes in the frame during the exposure.
Google search for "lightning rolling shutter" reveales interesting examples.
answered 2 hours ago
szulat
3,42811025
It takes approximately 2-4 milliseconds for a typical mechanical shutter curtain to transit a APS-C or FF sensor. Are you saying the fastest electronic shutters require 20-40 milliseconds to do a single readout? That's 1/50 to 1/25 seconds. How would 60 fps or 120 fps be possible at such slow speeds?
– Michael Clark
1 hour ago
they are simply not possible ;-) at full resolution. even some new cameras from top manufacturers don't support 4K video recording! but of course things are getting better each year...
– szulat
1 hour ago
oh, and i mean typical electronic shutters, not the fastest ones. sony A9 seems to be well ahead of the competition here (but still slower than mechanical). and of course it would be nice to see a global shutter consumer camera some day...
– szulat
1 hour ago
add a comment |Â
up vote
1
down vote
up vote
1
down vote
Looks like the rolling shutter effect, which is more pronounced in (but not limited to) the video mode.
Like you suspected, the effect is caused by different parts of the image being captured at slightly different times. Electronic shutters (used in the video mode) are currently about 10 times slower than mechanical shutter, which means more chance for dramatic changes in the frame during the exposure.
Google search for "lightning rolling shutter" reveales interesting examples.
answered 2 hours ago
szulat
3,42811025
Looks like the rolling shutter effect, which is more pronounced in (but not limited to) the video mode.
Like you suspected, the effect is caused by different parts of the image being captured at slightly different times. Electronic shutters (used in the video mode) are currently about 10 times slower than mechanical shutter, which means more chance for dramatic changes in the frame during the exposure.
Google search for "lightning rolling shutter" reveales interesting examples.
answered 2 hours ago
szulat
3,42811025
answered 2 hours ago
szulat
3,42811025
answered 2 hours ago
szulat
3,42811025
answered 2 hours ago
szulat
3,42811025
3,42811025
It takes approximately 2-4 milliseconds for a typical mechanical shutter curtain to transit a APS-C or FF sensor. Are you saying the fastest electronic shutters require 20-40 milliseconds to do a single readout? That's 1/50 to 1/25 seconds. How would 60 fps or 120 fps be possible at such slow speeds?
– Michael Clark
1 hour ago
they are simply not possible ;-) at full resolution. even some new cameras from top manufacturers don't support 4K video recording! but of course things are getting better each year...
– szulat
1 hour ago
oh, and i mean typical electronic shutters, not the fastest ones. sony A9 seems to be well ahead of the competition here (but still slower than mechanical). and of course it would be nice to see a global shutter consumer camera some day...
– szulat
1 hour ago
add a comment |Â
It takes approximately 2-4 milliseconds for a typical mechanical shutter curtain to transit a APS-C or FF sensor. Are you saying the fastest electronic shutters require 20-40 milliseconds to do a single readout? That's 1/50 to 1/25 seconds. How would 60 fps or 120 fps be possible at such slow speeds?
– Michael Clark
1 hour ago
they are simply not possible ;-) at full resolution. even some new cameras from top manufacturers don't support 4K video recording! but of course things are getting better each year...
– szulat
1 hour ago
oh, and i mean typical electronic shutters, not the fastest ones. sony A9 seems to be well ahead of the competition here (but still slower than mechanical). and of course it would be nice to see a global shutter consumer camera some day...
– szulat
1 hour ago
It takes approximately 2-4 milliseconds for a typical mechanical shutter curtain to transit a APS-C or FF sensor. Are you saying the fastest electronic shutters require 20-40 milliseconds to do a single readout? That's 1/50 to 1/25 seconds. How would 60 fps or 120 fps be possible at such slow speeds?
– Michael Clark
1 hour ago
It takes approximately 2-4 milliseconds for a typical mechanical shutter curtain to transit a APS-C or FF sensor. Are you saying the fastest electronic shutters require 20-40 milliseconds to do a single readout? That's 1/50 to 1/25 seconds. How would 60 fps or 120 fps be possible at such slow speeds?
– Michael Clark
1 hour ago
they are simply not possible ;-) at full resolution. even some new cameras from top manufacturers don't support 4K video recording! but of course things are getting better each year...
– szulat
1 hour ago
they are simply not possible ;-) at full resolution. even some new cameras from top manufacturers don't support 4K video recording! but of course things are getting better each year...
– szulat
1 hour ago
oh, and i mean typical electronic shutters, not the fastest ones. sony A9 seems to be well ahead of the competition here (but still slower than mechanical). and of course it would be nice to see a global shutter consumer camera some day...
– szulat
1 hour ago
oh, and i mean typical electronic shutters, not the fastest ones. sony A9 seems to be well ahead of the competition here (but still slower than mechanical). and of course it would be nice to see a global shutter consumer camera some day...
– szulat
1 hour ago
add a comment |Â
up vote
-1
down vote
I appears to be an image from a camera with a built-in neutral density (ND) filter, that was caught in mid-transition between filter and no-filter (or vice versa).
The transition line appears to be a all-or-none ND filter, which is not typical of most photographic graduated ND filters. Photographic ND grads have a transition region of a certain width, described as various forms of "soft ND grad" or "hard ND grad". This is because a stark transition would look bad, and virtually impossible to blend into the scene (such as here).
But several video cameras have built-in on/off ND filters, that rotate between the clear (no filter) and ND filtered regions. This just appears to be a single frame of a video where the filter was transitioning between "on" and "off" (or again, possibly vice-versa).
answered 2 hours ago
scottbb
17.7k75185
add a comment |Â
up vote
-1
down vote
I appears to be an image from a camera with a built-in neutral density (ND) filter, that was caught in mid-transition between filter and no-filter (or vice versa).
The transition line appears to be a all-or-none ND filter, which is not typical of most photographic graduated ND filters. Photographic ND grads have a transition region of a certain width, described as various forms of "soft ND grad" or "hard ND grad". This is because a stark transition would look bad, and virtually impossible to blend into the scene (such as here).
But several video cameras have built-in on/off ND filters, that rotate between the clear (no filter) and ND filtered regions. This just appears to be a single frame of a video where the filter was transitioning between "on" and "off" (or again, possibly vice-versa).
answered 2 hours ago
scottbb
17.7k75185
add a comment |Â
up vote
-1
down vote
up vote
-1
down vote
I appears to be an image from a camera with a built-in neutral density (ND) filter, that was caught in mid-transition between filter and no-filter (or vice versa).
The transition line appears to be a all-or-none ND filter, which is not typical of most photographic graduated ND filters. Photographic ND grads have a transition region of a certain width, described as various forms of "soft ND grad" or "hard ND grad". This is because a stark transition would look bad, and virtually impossible to blend into the scene (such as here).
But several video cameras have built-in on/off ND filters, that rotate between the clear (no filter) and ND filtered regions. This just appears to be a single frame of a video where the filter was transitioning between "on" and "off" (or again, possibly vice-versa).
answered 2 hours ago
scottbb
17.7k75185
I appears to be an image from a camera with a built-in neutral density (ND) filter, that was caught in mid-transition between filter and no-filter (or vice versa).
The transition line appears to be a all-or-none ND filter, which is not typical of most photographic graduated ND filters. Photographic ND grads have a transition region of a certain width, described as various forms of "soft ND grad" or "hard ND grad". This is because a stark transition would look bad, and virtually impossible to blend into the scene (such as here).
But several video cameras have built-in on/off ND filters, that rotate between the clear (no filter) and ND filtered regions. This just appears to be a single frame of a video where the filter was transitioning between "on" and "off" (or again, possibly vice-versa).
answered 2 hours ago
scottbb
17.7k75185
answered 2 hours ago
scottbb
17.7k75185
answered 2 hours ago
scottbb
17.7k75185
answered 2 hours ago
scottbb
17.7k75185
17.7k75185
add a comment |Â
add a comment |Â
Mohammad Al-Turkistany is a new contributor. Be nice, and check out our Code of Conduct.
Mohammad Al-Turkistany is a new contributor. Be nice, and check out our Code of Conduct.
Mohammad Al-Turkistany is a new contributor. Be nice, and check out our Code of Conduct.
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Is this a still frame extracted from a video?
– mattdm
3 hours ago
@mattdm Yes, According to the owner.
– Mohammad Al-Turkistany
3 hours ago
Although some similar things affect photography, given that you're specifically interested in video this is likely better at video.stackexchange.com
– mattdm
3 hours ago
1
actually it is not a video frame. the linked video shows a smartphone app reviewing a series of photos taken in the burst mode. so even if the picture is extracted from a video, it is still a photo, taken in a photo capture mode. of course, smartphone means electronic shutter, so it's similar to what "serious" cameras do in video mode.
– szulat
1 hour ago
@szulat Yes, I think you are right. The resolution is much better than a video frame.
– Mohammad Al-Turkistany
1 hour ago