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Check and Repeat

De-focus your lens manually then repeat the previous steps to check that you made the

optimal adjustment(s). Repeat this process for each camera and lens combination until

"0" is the sharpest point on the scale for all of them.

Note: It is recommended to recheck the settings annually, when the lenses have been

used frequently, when they have been exposed to extreme temperatures or anytime

you believe your focus performance has changed.