1. Using a surface illuminated by natural light, measure down a textured wall (brick is good) 4-5 feet from a known point (door frame, etc). At eye level, stick a piece of 1/2 inch (or narrower) strip of black electrical tape vertically on the surface.
2. Perpendicular (90 degrees) to the known measuring pont (1), measure the same distance out from the wall and mark the location.
3. Stand on the point marked in 2, center the tape on the focus screen then allow your camera to AF on the electrical tape. You are taking a shot at about a 45 degree angle to the tape.
4. Holding the camera very still, take a photo.
5. When the photo appears in the view finder, before it disappears, hit the review button to freeze the shot.
6. While the shot is visible, spin the magnifying wheel to enlarge the shot until you can see where the texture on the wall is sharpest. If its at or very near the tape, you are probably OK. Do this several times, just to make sure you are getting consistency. If it's not close to the tape, follow the instructions in the Manual to adjust, then repeat as needed until all is OK.
Works for me... might just work for you too.
Cheers...
Last edited by Michaelina2; 05-24-2010 at 01:01 PM.
Reason: Added natural light proviso