Panasonic LUMIX DC-TZ90 Operating Instructions For Advanced Features page 179

[Extended ISO]
Recording mode:
You can extend the numeric values that can be set for ISO Sensitivity.
→ [Rec] → [Extended ISO]
Settings: [ON] / [OFF]
●
The setting cannot be made during 4K photo recording or recording in [Post Focus].
[Diffraction Compensation]
Recording mode:
The camera raises the resolution by correcting the blurriness caused by diffraction when
the aperture is closed.
→ [Rec] → [Diffraction Compensation]
Settings: [AUTO] / [OFF]
●
Noise in the periphery of the picture may stand out with higher ISO sensitivity.
179
Using Menu Functions
Menu list
DVQP1304