Nest Cam Outdoor comparison with one of the favorite low light cameras here [ available for about the same price per camera as the Nest Cam Outdoor camera ]
from
Nest Cam Outdoor – Install & Explore
and
Dahua Starlight Varifocal Turret (IPC-HDW5231R-Z)
IPC-HDW5231R-Z | Dahua Technology - Dahua Technology
Selected
Nest Cam Outdoor Specs w/my notes in [ notes ] comparing a
Dahua Starlight Turrent HDW5231R-Z as an example.
Camera - 1/3-inch, 3-megapixel sensor with millions of colors and 8x digital zoom
[ 1/2.8" 2MP sensor - larger sensor ]
Video: Up to 1080p (1920 x 1080) at 30 frames/sec, H.264 encoding
[ 50/60fps @ 1080p(1920×1080) ]
Field of view: 130° diagonal [ 97°~34° HFOV -> results in better ID potential ]
Operating temperature: –4° to 104°F (–20° to 40°C) [ -22° F ~ +140° F .. ]
Weather resistance IP65 rating [ IP67 - significantly better ]
Wireless: Wi-Fi 802.11a/b/g/n, 2.4GHz or 5GHz (WEP, WPA, WPA2 encryption supported) [ WIred PoE - a more reliable solution ]
With regards to Audio - if you require audio please note that there was a good discussion in a forum on that - and the summary was that if you wanted to communicate via audio with someone you should be looking at a voip solution as security camera specs are not designed for that. Note many of the Dahua models are able to record audio as well as video.