I was wondering is it possible that the camera body is not focusing correctly? I just switched from Nikon to Canon. I bought a used 30D and 3 new lenes. Canon 85 1.8 Canon 70-200 f/4 L Tamron 17-50 2.8 None of these lenes are tack sharp, in the view finder they look good but when I put the images on the computer, they are slightly blurry. Now pretty much I would be able to sharpen it in Photoshop, but I thought these lens were suppose to be tack sharp. I've made sure that my shutter is high enough, for example I was using the Tamron at 30mm 1/200 f/4 and focused on a can of soup and even though the label was readable it wasn't what I would call sharp. I read many reviews on these lenes and from what people have said is all good with sharpness. Another thing I noticed is if I get maybe 3 feet from the subject that I will get a tack sharp image but if I'm 6 feet away it's not what I would expect for sharpness. I'm just confused because when I had a Nikon D40 and used my 50mm 1.8 I got great images that were sharp right out of the camera. FYI my settings have been the same with both cameras for example I turn off all in-camera editing, and with the Nikon I still got great sharp very contrasty images. I know this went a little long so let me remind you what my question is. Could the camera body be the cause of this problem or did I just end up with 3 bad lenes?