RitzCamera is currently running a sale on two Sigma wide angle lenses for Nikon F-mount:
→ Sigma 14mm f/1.8 DG HSM Art lens for Nikon F-mount for $1,199 ($400 off)
→ Sigma 24mm f/1.4 DG HSM Art lens for Nikon F-mount for $639.00 ($239.98 off with free filter kit)
RitzCamera is an authorized Sigma US dealer (listed under Camera World).