denis.olivier

Hello

I recently acquire 2 days ago an EOS 5D camera.

I do a lot of long exposures, sometimes during daylight, from 1 to 20

minutes.

Previously I don't have this problem with my 20D, I know

that was a known problem with ancient film cameras, so I'm surprised

and a little bit disappointed at this time.

You'll find here 2 shots (EXIF info are in) taken a the same

moment (buld mode 180 seconds, with a ND400 filter).

The 44 is as is, you see a lot of banding and light zoning:

http://www.denisolivier.com/img/misc/img_0044.jpg

The 46 is taken with my scarp around the body to prevent

outside light coming through the viewfinder.

http://www.denisolivier.com/img/misc/img_0046.jpg

I repeat this many times to be sure from different locations,

I always have this problem. My lens is a Canon 16-35 f/2.8 L zoom.

Is this a known "problem" coming with the specific 5D design?

I searched the net and don't find anything at this time.

Thank you for you attention, and advices, if any.

Denis Olivier.