5D unusual noise banding

5d, Iso 200, 100% crop. This problem is more common in the corners and shadows, but not always present. not sure what makes it come on. this is shot raw, an I did not do any noise reduction to exaggerate the effect. what causes this?

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RF interference comes to mind. Also, in DPP some times using a too low quality level for conversion will introduce this look. Was it grossly underexposed? That's all my brain can think of right now.

Could it be moire? - not exactly sure how the moire filter (forgot whats it called) could have come off or got damage though.

someone else could tell you more on this.

thanks guys. I am thinking maybe moire also. I bought the camera used. I did not adjust exposure after the shot, so its not that I am pushing the exposure. I am not sure either.

I cranked the contrast up using curves.

It looks exactly like RF interference to me - the classic herringbone pattern. Are you using any wireless devices?

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yes, using a photix wireless remote

kevindar wrote in post #5588435
yes, using a photix wireless remote

This is premature, but: aha!

Time for some tests, eh?

-js

My memory is fuzzy, but I think there was another case a few months back where a POTNer had RFI with a wireless remote. He selected an alternate frequency and the interference vanished. I think.

-js

In the name of science I shall run the experiment. this sucks. I like my wireless remote.

Looking forward to your results. I am very interested in the Photix system.

Not sure why Canon does this but why does my Elan II have a $20 remote and my 40D remote from Canon is $9000!!!

OK, so it's not quite that much but OUCH! It's just a remote!

Test done.
Interference is definitely due to the photix remote. on mirror lock up, if I open the shutter, I have to press the button again for it to take a picture. If I hold the button down on the sender, there is the pattern everytime. If I just click on it, the pattern is less. If I am standing 5 feet away, there is no pattern, and if I just use the shutter, there is no pattern. I tired to change the combination (channel) but as expected there is no improvement as it is still sending the RF signal.

Forgive me for bringing an old thread back to life but is the 5D unusually succeptable to EMI?

I've got some shots I took the other day in our broadcast compound at the Infineon Raceway (formerly Sears Point.) Several of them show this exact same herringbone pattern in the blacks and dark greys of photos that were maybe 1/2 to 2/3 of a stop underexposed (Didn't notice I had FEC dialed back on my 580...)

I'm wondering if proximity to satellite uplink trucks may have caused it?

Hi, I just found this thread and forum in search of help, for what I believe is radio frequency banding.

I photographed rooftop fireworks, ontop of a 44 story building with many, many antennas and dishes. To my horror after coming home to review the images, most had extreme banding. Can you all confirm this is the case? I'm shooting with a Canon 5D.

Also, does this banding occur with film cameras?
What (in camera) is exactly affected by the radio frequency interference?

I've enclosed two samples.
Thanks for any info.

Peter

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It is likely the remote. thats what it was in my case. I have set my remote to a 2 sec delay.

Might just have to look into an ST-E2.