Hi there,
I now got my Mitu M Plan APO 5x and done some shots with it.
Absolutely happy with my insect stacks. My mineral stacks need improvement.
On the Mitu spec it says depth of focus is 14µm. The focus stacking calculator on Extreme-Macro says 31µm as I convert the NA 0.14 to f/# as 3,53. I think if I get the StacShot and set it to 10µm steps it would be fine?
Currently I now move manually 25µm....
Yes, this is 5x with Canon EF 70-200 f/2.8 set to 200 on my EOS 7D
FOV focus stacking
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Re: FOV focus stacking
Mitutoyo is quoting single-sided depth of focus, that is, maximum deviation from perfect focus.Harald wrote:On the Mitu spec it says depth of focus is 14µm
Total depth of focus is twice that, so 28µm using Mitutoyo's assumptions. This is only a little different from Extreme-Macro's calculator, due to slightly different assumptions.
Your current step size of 25µm is fine.
Reducing that to 10µm may make things even better, assuming that more than doubling the number of frames is not a problem for you.
--Rik