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Re: [OM] WTFocus Stacking`

Subject: Re: [OM] WTFocus Stacking`
From: "Wayne Harridge" <wayne.harridge@xxxxxxxxxxxxxxxxxxx>
Date: Mon, 18 Jul 2022 11:03:12 +1000
Thanks Joel, it looks like a fair bit of experimentation will be required to
work out the best combination of aperture/focus differential/number of shots
for a few lenses & focal lengths.

...Wayne


> -----Original Message-----
> From: olympus <olympus-
> bounces+wayne.harridge=structuregraphs.com@xxxxxxxxxxxxxxxxx> On
> Behalf Of DZDub
> Sent: Monday, 18 July 2022 1:45 AM
> To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>
> Subject: Re: [OM] WTFocus Stacking`
> 
> On Sat, Jul 16, 2022 at 7:25 PM Wayne Harridge <
> wayne.harridge@xxxxxxxxxxxxxxxxxxx> wrote:
> 
> > I've read through that DP Review thread several times and from what I
> > understand:
> >
> > * The focus differential you set for FS is not a fixed value but is
> > modified by the camera depending on aperture (and presumably focal
> > length)
> > * The focus differential you set for FB is a fixed value and is not
> > modified by the camera depending on either aperture or focal length
> >
> > Is this correct?  I found the posters explanation somewhat confusing.
> >
> 
> Your first bullet seems like it must be true if the DP reviewer's summary
is
> correct and "3" can be taken more or less as a constant for giving the
greatest
> latitude from the choices of number of photos and DOF at particular stops.
> 
> My inclination going forward is:
> 
>      *  set FS parameters at the max number of photos (15 for me) and "3"
> and shoot more or less wide open or possibly stopped down 1 stop -- might
> get lucky and then done, but probably not.
>      *  if focus goes too deep on the in-camera FS, you probably can get
exactly
> what you want from a portion of the photos on the card and get rid of the
> rest after doing a third-party FS
>      *  if focus is not deep enough on the in-camera stack, change to FB
and
> increase photos to 30 or so;  might as well reduce differential from "3"
to "1"
> because reliance is on number of photos to cover desired range of focus
> 
> Making any sense?  I tend to like seeing what the camera does with the FS.
> I might get over that as I get more experience.
> 
> Joel W.
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