I have updated to 2.0.7 recently.

I have noticed this effect when orienting the camera to the sun (17-40L at 17) I havent tried another lenses due to the risk of damaging the sensor. I use to do this when playing with my slider with the sun behind a wood or some leaves.

Any else have experienced anythin similar?

Thanks.

Tomeu

What you're seeing is probably some flare effect. The wide-angles are very prone to flare.

It's not a flare. This is an artifact of the CMOS sensor you'll also see with very bright lights. No avoiding it unfortunately.

Applied Color Science (http://www.appliedcolorscience.com/black_sun.htm)

The RED camera had the same problem when it first came out. It's fixed now.

Thanks for the answers!

The black donut appears around the solar disk so I think is due to the CMOS sensor.

Tomeu