I like my bulky 12-24/2.8 GM.It is tack sharp wide open,has excellent colour rendition and microcontrast too.12mm gives more creative options than,say, 16 or 18mm too.I use it mostly for architecture and interiors.

ILCE-7RM4A FE 12-24mm F2.8 GM lens 12mm f/2.8 1/30s 250 ISO 0.0 EV

ILCE-7RM2 FE 12-24mm F2.8 GM lens 12mm f/4.0 1/30s 1600 ISO 0.0 EV

ILCE-7RM4A FE 12-24mm F2.8 GM lens 13mm f/8.0 1/60s 100 ISO 0.0 EV

ILCE-7RM2 FE 12-24mm F2.8 GM lens 12mm f/8.0 1/60s 500 ISO 0.0 EV

ILCE-7RM2 FE 12-24mm F2.8 GM lens 24mm f/2.8 1/60s 160 ISO 0.0 EV

ILCE-7RM4A FE 12-24mm F2.8 GM lens 12mm f/5.6 1/30s 100 ISO 0.0 EV