Ghosting problems

[gruntre69]

Hi all,

I took this on the weekend with my 20D and my new 70-200 EF L IS f/2.8 lens. Can any one tell me exactly what causes this ghosting around the white collar. I have a feeling it is caused by using the lens wide open.
Here is the shot data:
Camera Model
Canon EOS 20D
Shooting Date/Time
21/08/2005 12:58:46 PM
Shooting Mode
Shutter-Priority AE
Tv( Shutter Speed )
1/500
Av( Aperture Value )
2.8
Metering Mode
Evaluative Metering
Exposure Compensation
+1/3
ISO Speed
100
Lens
70.0 - 200.0 mm
Focal Length
200.0 mm
Image Size
3504x2336
Image Quality
Fine
Flash
Off
White Balance Mode
Auto
AF Mode
AI Focus AF
Thanks for any tips