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<blockquote data-quote="Paliswe" data-source="post: 804930" data-attributes="member: 48977">Determining the number of shots when doing focus shift in landscape photography is unnecessary as the camera stops when you reach infinity. Just set the number to 100 or 200 or a value that far exceeds what is needed. If you reach infinity after 12 shots, the camera stops.Should you not reach infinity, when the camera stops, just continue with one more shooting, the lens will continue from the last focus distance.The number of steps is the number of shots if you set the step to 1. In my experiment I have set the focus step to 2. Sometimes (before I became aware of the differences between the lenses) I have used 5 steps, resulting in blurry areas when I finally stacked the pictures. The problem is that you don't know how big a focus step is for a certain lens. You want it to be 4/10 of DOF and that's a good assumption, but different lenses can give anything between 2/10 and 8/10 of DOF (or more).Since information about this cannot be obtained from calculators based on the camera, you have to test what number of focus step you shall enter in the camera's focus shift menu, for each lens.In my case I now know that for my Z 24-200 I should always use 1, but for my Z 70-200 (and Z 105) I can happily use 5.</blockquote>

[QUOTE="Paliswe, post: 804930, member: 48977"] Determining the number of shots when doing focus shift in landscape photography is unnecessary as the camera stops when you reach infinity. Just set the number to 100 or 200 or a value that far exceeds what is needed. If you reach infinity after 12 shots, the camera stops. Should you not reach infinity, when the camera stops, just continue with one more shooting, the lens will continue from the last focus distance. The number of steps is the number of shots if you set the step to 1. In my experiment I have set the focus step to 2. Sometimes (before I became aware of the differences between the lenses) I have used 5 steps, resulting in blurry areas when I finally stacked the pictures. The problem is that you don't know how big a focus step is for a certain lens. You want it to be 4/10 of DOF and that's a good assumption, but different lenses can give anything between 2/10 and 8/10 of DOF (or more). Since information about this cannot be obtained from calculators based on the camera, you have to test what number of focus step you shall enter in the camera's focus shift menu, for each lens. In my case I now know that for my Z 24-200 I should always use 1, but for my Z 70-200 (and Z 105) I can happily use 5. [/QUOTE]

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