I've tried a few time to take moon shots. I have a Canon FL 55-135mm lens and a focal doubler for the FL/FD mount. I put the two on my GF5 and tried to take photos of the moon. But it seems I can't focus on it. If I could just turn the focus ring a bit more it'd make it, but seems to keep coming up shy. I thought maybe I had a bad adaptor, so I went inside and using all three of my Canon lenses measured them at 5, 7, and 10 feet. They call came in correctly. To do this, I pulled out my tape measure, and set the camera (on tripod) film plane to wall distance, then focused the lens and looked to see what it was. They all matched. So I pulled out my AE-1 and put the lens on it and measured to the wall again, and it was correct. Then I went outside and tried to focus on the moon. I had forgotten how hard it was to focus the Canon in low light. But it had the same issue. Thinking the doubler was at fault, I pulled it out and the zoom lens on the AE-1 still couldn't focus on the moon. Is this a common "problem" of these old FL/FD lenses? What can I do to get that last bit? Does the lens need to come closer or farther from the sensor to get that focus "past infinity"? Below is the image I got. It is cropped a bit. I can post the 1x1 image if you'd like.