I am looking for a PTZ camera that will allow me to zoom in and get clear facial pictures from close up to +50 meters away. The area is a flat ramp area and is usually lit when people are arriving. It will be connected to an NVR. The camera is more for getting pictures of people and not for security. Below are some cameras I have looked at. Any suggestions? Should I be worried about Chinese cameras and their firmware?
amcrest.com
Thanks in advance

Amcrest 4MP Outdoor PTZ PoE + IP Camera Pan Tilt Zoom (Optical 25x Motorized) PoE+ Camera Security Speed Dome, PoE+ (802.3at) 4MP, IP4M-1063EW-AI
AMCREST MODEL: IP4M-1063EW-AI FEATURES: This PTZ Speed Dome PoE AI Camera features Smart Motion Detection (SMD) which allows the camera to detect and filter between human and vehicle motion events. IVS features (tripwire and intrusion) for perimeter protection, and face detection to detect...
Amazon.com: DHTek/Dahua OEM SD49225IN-HC-S3 CCTV PTZ Camera,2MP HDCVI high Speed 25X Optical Zoom,Starlight Color Image in Night,4.8mm~120mm Varifocal Lens,IR Night Vision 300ft,IP66, Outdoor for Home Security : Electronics
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www.amazon.com
Thanks in advance
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