I apologize off the bat for my ignorance in this field & the simplistic language! I have a canon T1i and I love it. Had a problem with my 18-55 lens and sent it to Mack Camera where I had a warranty. Decided to send the body as well even though it seemed fine. Lens needed focus assembly but body was said (by Mack) to be fine. When I received it back & put both lens I had on it I noticed that it looked different through the viewfinder. Usually I see my subject in a full sized rectangular view, but now I see my subject through a much smaller round area with black all around it. Almost as though I was looking through just the lens and not the body. I am NOT impressed with Mack camera's customer service at all! Takes them forever to get back to me & apparently they send back broken equipment. Hoping it's a setting and not broken.