Focus stacking RP, R6, R5

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JustUs7 Senior Member • Posts: 1,343
Focus stacking RP, R6, R5

I get the gist of the focus stacking tool and how to combine them in post for macro.  What I haven’t found is a good explanation of when to use 1 vs 2.... vs 10 for the spacing / # of shots.

If shooting at f2.8 from 18 inches away using an 85 mm, I have a razor thin 0.2” depth of field. If I take 20 shots in a total depth range of two inches, the whole subject should be pretty sharp. But from 1 - 10, what gets me the focus increment I want?  I know 1 is less and 10 is more. But I have no idea if 1 is too little. It 5 is good enough.

Is there any math for this or is it trial and error?

 JustUs7's gear list:JustUs7's gear list
Canon EOS 1000D Canon EOS Rebel SL1 Canon EOS RP Canon EF 75-300mm f/4.0-5.6 III Canon EF-S 18-55mm f/3.5-5.6 IS +3 more
Canon EOS R5 Ricoh Caplio R6
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