I have a Canon 20D (1.6 crop). I recently tried to take some panoramic photos at 35mm zoom setting and got lots of distortion. Can anyone tell me what I should be shooting at? Here is my picture if anyone is interested: http://image50.webshots.com/150/6/11/59/2079611590089587892NYQyoa_fs.jpg It's a panoramic shot of Red Rock Canyon outside of Las Vegas. Thanks!