p.1 #1 · focus stacking with MC 105 & AF-S 105/2.8G
Dear fellows,
to take close-ups using the focus stacking technique, I currently use my trusty (Made in Japan) AF-S 105/2.8G, dating back to 2011.
The attached picture shows the variation of the Angle of View (AoV) of my lens compared to the Z MC 105/2.8 S.
The variation of the AoV (aka focus breathing) is due to the increased magnification, combined to the change of focal length, F, and pupil factor, P, according to the equation AoV = 2 x arctg {X/[2F(1+R/P)]}, where X is the diagonal of the sensor/film (even if F and P remained constant throughout the entire focus range, the AoV would decrease for the sole reason that magnification increases).
Anyway, the data in the plot come from https://photonstophotos.net/GeneralTopics/Lenses/OpticalBench/OpticalBench.htm
and show that both lenses exhibit a steep reduction of the AoV at close-up distances.
It's a well established fact that focus breathing can negatively impact focus stacking by shifting the image composition. As a consequence, the composition of each image in the focus stack will be subtly different, and the software has to work harder to align & match them. The end result is a greater likelihood of artifacts that must be patiently corrected.
And here comes my question: those of you who have used both lenses for focus stacking by changing the focus, have you noticed any differences? Do they behave in the same way or does one of them tend to produce fewer artifacts?
I use (and like) Zerene.
