Nothing at all...here is a somewhat recent picture that was shrunken down using MS paint and uploaded on imageshack, from 3megs down to 300kb. I suck at photography, but just to show that this is how it takes pictures...I'd also be willing to just buy the 18-55. I do kind of like this lens...let me know how much. I need the 18-55 as a "cheap" alternative to wide angle for taking pictures of rooms inside houses.