Example of nasty banding (pattern noise) with Pentax K20D

mr.twister · 09-02-2009, 08:54 AM

Example of nasty banding (pattern noise) with Pentax K20D

The K20D is a fine camera. But this shooting was a nasty surprise.

User Photo Gallery - Miscellaneous Photos

shows part of picture taken with K20D on tripod on the summit of a mountain near telecommunications installations (Radio and Mobile Phone Transmitters).

Banding visible in JPG and RAW (DNG) formats.
Banding visible in all pictures taken at this site on a tripod.
Banding most visible in underexposed areas.
Banding not (clearly) visible on pictures taken free-hand with shake control at this site.

Any idea of how to filter this noise out?

**jbinpg** · 09-02-2009, 01:00 PM

I believe DSLR sensors are susceptible to EMF fields. So you may be seeing its effects if you were near power lines. Other than enclosing the camera in an EMF-proof shield, I don't see how this could be avoided except by increasing the distance between you and the EMF emitter.

Jack

**Ash** · 09-02-2009, 02:10 PM

Quite a different kind of banding that what I expected.
Though not unexpected interference-type artifact given the proximity to a powerful radio transmitter.

As long as you're not shooting a view from the transmitter or the transmitter itself, just shoot away from it.

KungPOW · 09-03-2009, 07:01 PM

As the others have stated, thats not banding.

That is EMF noise.

I expect ALL DSLR's are suseptable.

Try film.

09-02-2009, 08:54 AM	#1
mr.twister New Member Join Date: Sep 2009 Photos: Gallery Posts: 1	Example of nasty banding (pattern noise) with Pentax K20D Example of nasty banding (pattern noise) with Pentax K20D The K20D is a fine camera. But this shooting was a nasty surprise. User Photo Gallery - Miscellaneous Photos shows part of picture taken with K20D on tripod on the summit of a mountain near telecommunications installations (Radio and Mobile Phone Transmitters). Banding visible in JPG and RAW (DNG) formats. Banding visible in all pictures taken at this site on a tripod. Banding most visible in underexposed areas. Banding not (clearly) visible on pictures taken free-hand with shake control at this site. Any idea of how to filter this noise out?

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09-02-2009, 01:00 PM	#2
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 3,546	I believe DSLR sensors are susceptible to EMF fields. So you may be seeing its effects if you were near power lines. Other than enclosing the camera in an EMF-proof shield, I don't see how this could be avoided except by increasing the distance between you and the EMF emitter. Jack

09-02-2009, 02:10 PM	#3
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	Quite a different kind of banding that what I expected. Though not unexpected interference-type artifact given the proximity to a powerful radio transmitter. As long as you're not shooting a view from the transmitter or the transmitter itself, just shoot away from it.

09-03-2009, 07:01 PM	#4
KungPOW Veteran Member Join Date: Nov 2007 Location: Vancouver, Canada Photos: Gallery Posts: 1,699	As the others have stated, thats not banding. That is EMF noise. I expect ALL DSLR's are suseptable. Try film.

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