Alvin? Alvin? Alvin?!?

I thought I had figured out how the “FUJIFILM Tether Shooting Plug-in PRO (Mac)” does automated focus bracketing. My working theory was (past tense) the plug-in commands the camera body/lens to move from one auto-focus (AF) focus point to another, based upon the two end-points selected by the user. So I devised a test for my theory. Turns out I was not only wrong, but I’m more confused than ever based upon my test results!

My theory arose from the observation that the focus point changed from the beginning to end of every focus bracket test shoot. For example, the first end-point was near the following focus point…

and the final focus point was near the last end-point.

My camera is set to display 425 AF points. There are 25 AF points in each row, as shown in the first photo.

For the first set of test shots, the plug-in set the number of shots to three (3). That made sense at the time, since I could have selected three AF points manually and covered the image well enough so that the entire subject is acceptably in focus at an aperture of f/16.

During the next two sets of test shots, I selected the same end-points but the plug-in wanted to set the number of shots to greater than 180 photos for both tests. No way I was going to shoot that many photos since my theory was a bust — 180 shots far exceeds 25, the number of AF points in a single row.

Perhaps the number of shots has something to do with the function of the slider for each eye dropper, but I don’t know — I haven’t figured out how the sliders work. (Anyone? A little help, please.)


A toy Alvin (the Chipmunks) was photographed against a pure white background (255, 255, 255) using the “Meet Your Neighbours” (MYN) technique.

02 FEB 2021 | BoG Photo Studio | toy Alvin (the Chipmunks)

9 photographs were taken using a Fujifilm X-T3 digital camera, Fujifilm MCEX-11 extension tube, and Fujinon XF80mm macro lens, including a set of three photos from my first automated focus bracket test shoot plus some test shots before/after the focus bracket.

The photos were edited using Apple Aperture, exported as TIFF files, then loaded into Adobe Photoshop CC 2017 in order to create the focus stack.

Related Resource: The Chipmunks : The Chipmunk Song (Christmas Don’t Be Late) (2:22)

Copyright © 2021 Walter Sanford. All rights reserved.

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