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07-09-2018, 03:41 PM   #1
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How to prevent this pattern when taking dimly lit photos?

IMGP2257 | Ganesh Selvan | Flickr.

Is this a fluorescent lighting issue or shutter speed issue? TIA

07-09-2018, 03:46 PM   #2
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LED street lamps? I assume you are referring to the horizontal banding visible on the pavement.


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07-09-2018, 03:51 PM   #3
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First thing popped into my mind was jpeg banding. Maybe Moire ??
07-09-2018, 03:52 PM   #4
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QuoteOriginally posted by funkythiru Quote
IMGP2257 | Ganesh Selvan | Flickr.

Is this a fluorescent lighting issue or shutter speed issue? TIA
Shoot under 1/50s and you should be good


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07-09-2018, 04:20 PM   #5
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Don't use an electronic shutter unless the shutter speed is a multiple of the line voltage frequency in your area (usually either 60 Hz or 50 Hz)

Using the mechanical shutter will avoid the banding although there may be slight exposure and color-shift issues with faster shutter speeds.
07-09-2018, 04:29 PM   #6
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QuoteOriginally posted by photoptimist Quote
Don't use an electronic shutter unless the shutter speed is a multiple of the line voltage frequency in your area (usually either 60 Hz or 50 Hz)

Using the mechanical shutter will avoid the banding although there may be slight exposure and color-shift issues with faster shutter speeds.
ES strikes again. Got it, thanks guys.
07-09-2018, 04:58 PM - 1 Like   #7
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This photo is in a series of three, one of which is free from banding. The image free from banding is taken at ISO 100 and with a shutter speed of 0.3 of a second. It is both a fluorescent and a shutter speed issue. As Adam said , keep your shutter speed lower than 1/50 as you did in the third image and you will be good.
07-09-2018, 05:37 PM   #8
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And remember to set correct AC frequency (50 or 60 Hz) in camera options.

07-10-2018, 03:33 PM   #9
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QuoteOriginally posted by photoptimist Quote
Don't use an electronic shutter unless the shutter speed is a multiple of the line voltage frequency in your area (usually either 60 Hz or 50 Hz)

Using the mechanical shutter will avoid the banding although there may be slight exposure and color-shift issues with faster shutter speeds.
Not using an electronic shutter is necessary, but not sufficient, to avoid it. I never use an electronic shutter and have seen the banding.
07-10-2018, 03:54 PM   #10
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QuoteOriginally posted by leekil Quote
Not using an electronic shutter is necessary, but not sufficient, to avoid it. I never use an electronic shutter and have seen the banding.
That is quite possible. Some high-efficiency fluorescent lights and LED light use much higher frequencies that the powerline frequency. With a very short shutter speed, the scan of the mechanical shutter slit occurs over more than one cycle.
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