Best Buy: Tamron 4 mm 12 mm f/1.4 Lens for C-mount M12VG412
M12VG412 Tamron 1/2" 4-12mm F/1.4 Mega Pixel, DC Auto Iris CCTV Lens - Industrial Security Cameras, Video Surveillance | USA Security Systems Technologies
NEW Tamron CCTV DC 2.8-12mm f/1.4 Lens # 13VG2812ASII 725211931812 | eBay
12VG412ASIR-SQ Tamron 1/2" 4-12mm F/1.2 Aspherical with connector Mega Pixel compatible Vari-Focal L - Industrial Security Cameras, Video Surveillance | USA Security Systems Technologies