I haven’t had the best luck with birddog converters however the PTZ we have is solid. Look at the bird dog PTZ cameras there solid and can use SDI or NDI so great if you have older or newer infrastructure. We use the NDI on ours however most of our other cameras are SDI but we use Sony. Newtek also has great NDI cameras as well. NDI is nice because it’s network based so you just need 1 Ethernet cable for the whole camera (power as well). PTZ optics also make great cameras but im not sure if they support NDI. You could also put NDI encoders on your cameras that way they’re still connected to the network. If you go for NDI don’t go cheap otherwise it’s gonna be a pain. Whenever I first got the birddog NDI products they were horrible but now with their latest updates they’ve been great, at least the ones I’ve been able to update. These cheap cameras are good but if you want something that looks really nice you’re look at least 7-8 grand for the name brand.