I had some time for more testing and this is what i found out:
On my K1 the automatic "zoom function" of the head didn't work.
On K5 / II K3 / II no problems.
During testing i had suddenly a strange malfunction you can see here:
I reseted the Shanny to factory default and suddenly the zoom was also working with my K1. But what still does not work is the AF light (goes with K5 / 3)
But it works when the K1 is set to Crop mode?!
I tested the Shanny also with different lenses. The automatic adjustment is never over 80mm (also not with the 50-135 or 80-200)!
Manually there are still 85, 105 135 & 200 possible
What is still interesting with the Tamron 28-75 on K3 / K5 are the adjustments of the head to the focal range as follows:
Tamron 28-75 2.8 (K5 / K3) / Shanny:
28mm / 24mm
35mm / 35mm
50mm / 55mm (sometimes 45mm depending on accuracy)
75mm / 80mm
DA 50-135 2.8 (K5 / K3) / Shanny to K3 / K5:
50mm / 45mm
60mm / 55mm
70-135mm / 80mm
On the K1 it behaves differently
Tamron 28-75 2.8 (K1) / Shanny
in FF mode:
28mm / 20mm
35mm / 24mm
50mm / 35mm
60mm / 35mm (sometimes 40mm)
75mm / 55mm
Tamron 28-75 2.8 (K1) / Shanny
in Crop mode:
28mm / 24mm
35mm / 35mm
50mm / 45mm
60mm / 55mm
75mm / 80mm
Pro:
Good recyclingtime, no problems
P-TTL works
HSS works
Everywhere rubber pads / nipples
Very good workmanship
Menu is super intuitive
Quick release locking mechanism
Cons:
No working AF light with K1 (Only in FF mode)
Not updateable
Sorry for my bad english