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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