Hi
I recently got sony a7r111 & 24-105mm lens. Great but couple of things. When shooting at night, floodlit buildings etc it really struggled to focus. Never had this before on canon 5d11or even my old Hasselblad. Tried moving focus point to edge of building where it should have locked on but no joy. Solution was to move point around till it eventually focussed then quickly switch lens to manual focus but really I didn't expect this.
On a similar note under studio flash is there a mode so view finder is nice and bright.
Also similar when shooting stars couldn't see a thing except lots of noise. Results were ok but couldn't see to compose. I'm pretty sure there must be can easy fix with last 2 points.