Fluoval/Amplival trinocular head. Lost magnification.

[Piter_]

Hi everybody.
In Fluoval, there is a trino head.
Reading magnification 1.6 for oculars and 3.2 for photo output. I have measured magnification ant it is more like 1 and 2. I wonder if this 0.6 have been lost somewhere in the relay optics of the excitation cube. How does it work in Amplival if anyone has it.
Thanks.
Petro.