Okay im too lazy to google this & would rather some spoonfeeding. I got a lot more throwouts than usual with my last two shoots. These were landscape shots, something I dont normally take. I am yet to test it but I think my AF is slightly off when focusing on or near infinate. Is this adjustable? Is it hard to do / should I just take it to canon? I remember hearing about some adjustment screws near the shutter. Also I was shooting at around F18 with the thrifty fifty, so I would assume the focus would have to be pretty out? I also used my sigma 10-20 and thoes seemed OOF too.