Originally posted by boriscleto Nothing about aperture control. And I can assure you the aperture works just fine.
That is the #2 at the bottom.. look at the legend at the top for the triangle.
"compatible with condition"
The chart is saying AF works fine, but there is a condition. What's the condition? It's the aperture.
---------- Post added 04-14-21 at 10:11 AM ----------
Originally posted by boriscleto And I can assure you the aperture works just fine.
You so sure?
KAF4 - electromagnetic diaphragm:
"This lens can be used on PENTAX K-1, K-3 II, K-S2 and K-S1 by firmware upgrade. If this lens is mounted on a camera without proper firmware upgrade, its diaphragm control mechanism becomes inactive, making it impossible to obtain correct exposure."
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