What were your camera settings if available? I was able to catch a couple of indoor shots of my pets when i owned the 135l without much of a bother in my opinion. I used both manual and auto focus as well. did you have the camera set to auto or manual mode? i have used it on the 40D at the time, and i still feel it was doing ok. i cant provide a sample, and even if i did they are not superior quality !