Cctv lenses

Samyang
https://www.youtube.com/watch?v=4LsiM9H8w_o  Samyang 800mm f/8 Mirror, & 2x telecoverter (with samples). Wide lens. Mirror lenses are cost effective (10x) vs telephoto lenses.

https://www.youtube.com/watch?v=wQCppYxR1U0 ultra wide cannon lens. Ultra Wide Canon Lenses on a Sony Camera - Rokinon 14mm F2.8 + WonderPana. WonderPana is extra large filters mounted on to lens. https://www.fotodioxpro.com/collections/wonderpana

https://www.youtube.com/watch?v=U3vNur71xfY a6500 1000mm lens, $80