Please Explain This Overexposure in Panning Shots

[Rekd]

Today I went to a Karting/Supermoto race at the local stadium and decided I wanted to try panning. Never really tried it before and I like the effect it gives to motorsports.

It was in a parking lot, mid-day with the sun almost directly overhead. I ended up with several shots that went from decent exposure to way blown out within the blink of an eye.

Went from this:

http://farm5.static.flickr.com/4080/4896855456_937f3ff674_o.jpg

To this:

http://farm5.static.flickr.com/4079/4896260101_b32a1e9f27_o.jpg

...in less than a second. Literally.

I couldn't tell the difference in lighting, but the aperture went from 9.0 to 6.3, (I was shooting Tv mode to do the panning). Is that the reason?

Can these be fixed?

Thanks.:cheers:

[Mohain]

It's your metering mode.

You're set to 'partial' which I think meters around the middle 15% of the image area. In the 2nd shot there's a lot more of the dark cart/driver and less of the light background in the middle part of the image, compared to the first shot so it's trying to compensate buy increasing exposure. Remember all the meter does is try to average everything to middle grey.

What I would do if I was shooting the same subject in unchanging lighting conditions would be to take a reading and dial it in on manaul mode. Keep an eye on the light and re-meter every now and then to make sure nothing has changed. A grey card can be very handy for situations like this.

[Aggie]

Also just turning a bit cn give you more light input. Look at the cone behind the driver. It is off a few feet from what the first one is, yet every thing about the driver seems the same. It tells me you turned just a bit. This lets more light into your camera. At noon the light may be overhead but it is not directly or exactly overhead but at it's highesty point and angled but not as much as the rest of the day. Just that bit of movement into the light will give you more input. Be cognizant of where the sun is even at noon. You will have to orient your body so that extra light will not effect you. As for all the digital stuff I have no idea.