Photography Mode

Freecam: Launch your game with -devmode on Steam and hit F3 to activate it (r_displayinfo 0 to hide the popup info)
FOV : cl_fov (cl_fov 30 for example)
Hiding HUD: cl_hud 0 (cl_hud 1 to show HUD again)
Hiding weapons: r_drawnearfov 2 (r_drawnearfov 60 to show weapons)

God mode: g_godMode = 1 (0 to turn it off)
AI: ai_IgnorePlayer = 1
Timescale: time_scale = 1