All optical lenses and camera bodies are built to a finite degree of focusing tolerance. This means that not every lens will be able to focus perfectly with every camera body right out of the box. However, modern camera bodies allow users to fine tune the focus of each new lens on one body through micro adjustments. Perform these micro adjustments immediately when you receive a lens. If performed correctly, your lens will be able to focus perfectly and will need no further adjustment. If you have correctly adjusted your lens and the focus is still inaccurate, you may have a bad copy of the lens and need to exchange it.
Instructions
- 1
Mount the new lens onto your DSLR camera. Locate the micro adjustment setting in your camera's menu bank. Look for settings such as "Focus Fine Tune" and "Micro Adjustment." Make sure that the focus adjustment is set to "0." Mount the camera onto a tripod.
2Spread the newspaper on a flat surface at least 3 or 4 feet away from the front of the lens. Mark a spot on the newspaper with an "X" using the marker. Focus on the center of the X using your camera's auto-focus function. Depress the shutter release and take one picture.
3Return to the micro-adjustment setting in your menu bank and adjust the number to +5. Focus on the center of the X again using your camera's auto-focus feature. Take a picture. Note that this picture was taken with a focus adjustment of +5 in your notepad.
4Change the micro-adjustment number to +10 and repeat the previous step. Record the setting for the third photograph in your notepad.
5Return to the micro-adjustment menu item and set the adjustment number to -5 and repeat the previous steps. Record the setting in your notepad. Reset the adjustment number to -10. Focus on the center of the X one more time and take a photo. Record the setting in your notepad. Turn off your DSLR camera.
6Upload the photographs to your computer. Examine each photograph and determine in which photograph the focus is most centered on the X on the newspaper. If the photo between +5 and +10 is the closest to the center, then continue to test all adjustment values between +5 and +10: +6, +7, +8 and +9.
7Upload these photos to your computer and examine each photo to determine which of these photographs is the most perfectly centered on the X. This is the adjustment value that will give you the best focus with your DSLR camera body and lens combination. Repeat these steps for all other lenses that require focus adjustments. Most DSLRs will store these adjustment values for each lens, so you will not have to enter in the adjustment value each time you swap lenses.
All optical lenses and camera bodies are built to a finite degree of focusing tolerance. This means that not every lens will be able to focus perfectly with every camera body right out of the box. However, modern camera bodies allow users to fine tune the focus of each new lens on one body through micro adjustments. Perform these micro adjustments immediately when you receive a lens. If performed correctly, your lens will be able to focus perfectly and will need no further adjustment. If you have correctly adjusted your lens and the focus is still inaccurate, you may have a bad copy of the lens and need to exchange it.
Instructions
- 1
Mount the new lens onto your DSLR camera. Locate the micro adjustment setting in your camera's menu bank. Look for settings such as "Focus Fine Tune" and "Micro Adjustment." Make sure that the focus adjustment is set to "0." Mount the camera onto a tripod.
2Spread the newspaper on a flat surface at least 3 or 4 feet away from the front of the lens. Mark a spot on the newspaper with an "X" using the marker. Focus on the center of the X using your camera's auto-focus function. Depress the shutter release and take one picture.
3Return to the micro-adjustment setting in your menu bank and adjust the number to +5. Focus on the center of the X again using your camera's auto-focus feature. Take a picture. Note that this picture was taken with a focus adjustment of +5 in your notepad.
4Change the micro-adjustment number to +10 and repeat the previous step. Record the setting for the third photograph in your notepad.
5Return to the micro-adjustment menu item and set the adjustment number to -5 and repeat the previous steps. Record the setting in your notepad. Reset the adjustment number to -10. Focus on the center of the X one more time and take a photo. Record the setting in your notepad. Turn off your DSLR camera.
6Upload the photographs to your computer. Examine each photograph and determine in which photograph the focus is most centered on the X on the newspaper. If the photo between +5 and +10 is the closest to the center, then continue to test all adjustment values between +5 and +10: +6, +7, +8 and +9.
7Upload these photos to your computer and examine each photo to determine which of these photographs is the most perfectly centered on the X. This is the adjustment value that will give you the best focus with your DSLR camera body and lens combination. Repeat these steps for all other lenses that require focus adjustments. Most DSLRs will store these adjustment values for each lens, so you will not have to enter in the adjustment value each time you swap lenses.
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