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Manual Focus

For most landscape work, careful manual focusing is the preferred way to operate, since there is frequently at least a slight focus error with autofocus, and even a slight error can greatly reduce resolution.

Stopping down, even to f/8, frequently will not correct “minor” focus errors. For some subjects this might be tolerable, since the exact plane of focus might not be terribly important to the overall composition. But for others, the difference is that of “crisp” vs “slightly soft” or “very soft”. Shooting a 10 or 12-megapixel DSLR and then being satisfied with slightly soft detail (eg the equivalent of 3 megapixels) makes little sense.

Manual-focus procedure

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