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Re: [OM] E-M1 focus testing

Subject: Re: [OM] E-M1 focus testing
From: Mike Gordon via olympus <olympus@xxxxxxxxxxxxxxxxx>
Date: Sun, 31 Jul 2016 19:01:17 -0400
Cc: usher99@xxxxxxx
Stacker Moose writes:


<<If I set for 10 shots and aperture @ f2, those shots will be very closely 
spaced and the total focal depth of the stack will be relatively shallow.


<Another caveat. The stack starts at the current focus distance and works its 
way farther away until it has taken the set number of shots. With subjects like 
flowers, insects, etc., its really easy to miss a bit or two that are closer 
<to the camera than where the lens is focused, resulting in a wonderful image, 
but for a couple of prominent bits that are softer - right up front. So I've 
taken to focusing, then moving the camera back just a little before pushing 
<the release the rest of the way. This has been working well for me.
<This is true for the E-M5 II, and I imagine the E-M1.

Good to know.  For static subjects with no wind, almost better to hand stack on 
a rail--at least easier to know one has the depth of stack about right.  There 
is an expensive stacking gizmo, but not much use in the wind. 
https://www.cognisys-inc.com/products/stackshot/stackshot.php
Cheaper and easier to have it built into the cam for many subjects.

 With dedicated stacking software one can set the "smoothing radius" as well.
It is sometimes very helpful.  if set small, can take a whole bunch of cloning 
work to have the image past the Moose test at 100%. 

Manual  stacker, Mike


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