Camera manufacturers keep making photography easier, and one of the best advancements was the invention of autofocus. With the push of a button, even an amateur can have an image with excellent focus. However, minor variances in the assembly of each individual lens can cause the autofocus to be slightly off. The imperfections may be so small that they can be seen only when the image is enlarged much more than normal. To correct this problem, the Canon 50D lets you make minor changes to the autofocus system so you can manually correct any poor lenses.
Instructions
1. Place the camera on a tripod, and point it at a stable target. Use a target that has good contrast, like a piece of paper with black and white boxes next to each other.
2. Press the shutter button halfway to autofocus on the target. When the target is in focus, take the picture.
3. Press the "Menu" button on the back of the camera, and turn the dial on top of the camera until the "Custom Functions" tab is highlighted.
4. Rotate the dial on the back on the camera to scroll to "Auto Focus/Drive," and press the "Set" button. Then scroll to "AF Microadjustment," and press the "Set" button to enter the microadjustment menu.
5. Scroll to "Adjust all by same amount," and press the "Info" button. You will see a series of numbers at the bottom of the screen. Rotate the wheel on the top of the camera to make the microadjustment. Press the "Set" button when you are done.
6. Take another picture. Turn the dial on the back of the camera counterclockwise to bring up the previous shot, then turn it clockwise to view the last shot. Compare the two shots to see which is better, then go back into the microadjustment menu, and make more adjustments until you achieve the focus you want.
Tags: back camera, dial back, dial back camera, microadjustment menu, press button
