Weird Artifacts with 20D when shooting jpgs in burst mode

[mark_ryan2]

I usually shoot RAW, but I was shooting some sports shots of my son and wanted

more than 5 frames at a time. I shot at fine jpg large and burst mode. AV moe

1/400 at f4 with 17-40 at 40mm end. The first shot of a series is fine, it is

by the 3rd shot that these artifacts show up in the shadows. I shot maybe 7-10

shots at a time.

 

If I shoot RAW I don't get them. If I shoot RAW+Ljpg, I don't get it. I get it

wit my Lexar 80x 1GB Pro CF and my UltraII card.

 

I'll try to post some examples.

 

First Shot

<img alt="1stShot" src="http://home.comcast.net/~markmryan/1stShot.jpg" />

 

Third Shot

<img alt="3rdShot" src="http://home.comcast.net/~markmryan/3rdShot.jpg" />

 

Anyone heard or seen this?

 

Really need help, I was planning on using this as my sports camera and a FF as

a landscape camera. 5 shots at a time is pretty limiting for sports.

 

Thanks,

Mark

[mark_ryan2]

Sorry for the formating, when I went back to insert some breaks, the post was gone, but when I went back forward it was still there. So rather than re-type it, I just posted it.

 

Thanks,

Mark

[mark_ryan2]

Updated to latest firmware 2.0.5, and it still does it.

 

?

[peter_rowe]

To which artifacts do you refer? The colored splotches in the shadows appear to be roses, is it the faint white band across the bottom of the image rising towards the left side? If so it is on the first shot as well - just not as pronounced. Are you sure they are not on the RAW files too -- these would be much less saturated etc. so perhaps it is there and you can't see it. Do you have a filter on the lens? Have you cleaned the sensor lately? I don't think this is the path of the shutter, although it is curved, so hopefully it is not a shutter problem which is something that might get more pronounced under burst mode.

[mawz]

@Peter Rowe: I think he's referring to the very pronounced banding in the second shot.

 

I'd suggest tryng a different card, otherwise a trip to Canon seems likely.

[mark_ryan2]

Adam has it right, it is the splotty area inteh lower right quadrant. It looks like a print that has stuck to another print and been peeled apart.

 

The part where it is showing the effect is in a part where there were some reflections thru the window I was shooting thru, but they show up in shots with out glass in them. I see it throught the shot, it is just easier to see in the certian areas. Plus, why would it not affect the first shot, but subsequent shots?

 

I've tried two different cards, although maybe I'll get a new one ;)

[mark u]

I think it will require a fix from Canon, which could be expensive if out of warranty, as this looks like a problem with the circuit boards/DIGIC processor picking up some interference as the circuits heat up. Give a precise explanation of the problem with some sample shots. You may want to suggest that even though the camera may be out of warranty, the fault is such that it should perhaps be treated as a warranty repair.

[mark_ryan2]

Tried it with the Large jpg coarse setting and that didn't solve the problem.

 

I don't do burst shots in jpg that often, but I did look back and this seems to have started happening in the last two years.

 

Hummm.

 

Mark

[mark_ryan2]

Even does it with medium fine JPGs.

 

?