Remove "Banding" in Photos

Started 4 months ago | Discussions thread
Leonard Migliore
Leonard Migliore Forum Pro • Posts: 16,323
Silent shutter banding

Badwater wrote:

Are those lines from the florescent lighting? Or some kind of shutter problem?

Both.

The OP used the Sony's silent shutter, which eliminates the mechanical shutter (that's why it's silent) and reads down (or maybe up) the sensor electronically. The problem with that is that it reads kind of slow, taking maybe 1/10 of a second to record the entire image; there's a lot of data on a sensor. Now the church lights are flickering at the line frequency (50 Hz), or maybe double the line frequency. So as the camera's reading down the sensor, the lights are getting brighter and dimmer quite a few times.

This used to be a problem with mechanical shutters because even though a focal plane shutter is fast enough to eliminate banding, the exposure could be off because the camera could meter when the light was bright and expose when the light was dim. Newer cameras like the Canon 7Dii and the D500 can sense this and fire the shutter when the light is at its maximum brightness. But that can't help a slow-reading electronic shutter.

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Leonard Migliore

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