Raspberry PI - Raspbian Static IP Address

auto lo

iface lo inet loopback

auto eth0
iface eth0 inet static
address 192.168.1.2
netmask 255.255.255.0
gateway 192.168.1.50

allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

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COMMENTS: Typically, most router are set by default to 192.168.1.1 so if 192.168.1.50, try 192.168.1.1