Dahua Camera Lens Changing

ben_r_

Young grasshopper
Feb 1, 2016
63
12
California
Looking at purchasing some new Dahua cameras (like the IPC-HDW4431C-A and the IPC-HDBW4421R, etc) and have noticed that one must pick which lens they want with these cameras (2.8mm, 3.6mm, etc) at the time of purchase. My question is can the lenses be purchased later, separately and swapped out?
 
Yes you can. I ordered one off aliexpress and they sent the wrong lens length and then said "sorry we were out of stock"... great.

It was cheap and I bought an M12 mount but then moved the camera to my parents so never fitted it. It did look right.