Seeking clarity on advertised Tilt angle standards

[fport]

Hello folks,

Our system requires PTZ cams mounted on a flat ceiling that can look vertically down at the floor beneath them, as well as looking away from the camera.
The horizontal view does not have to look towards the horizon (although is nice to have).

We currently use HIK PTZs and on their OSD they display T90 when looking vertically down at the floor.

I am looking at alternatives and came across the following that fulfil some requirements, but I cannot tell 100% if they can look vertically down at the floor when mounted on a flat ceiling (I have quoted the tilt description):
Uniview -UNV IPC6434LR-X16-VG1 Lighthunter - Tilt Range –5°~90° auto flip
GeoVision - GV-GPTZ4810 4MP - Tilt from 15° to 90°
Speco - O4P3X 4MP 0 to 67° tilt range

Is there a standard way manufacturers specify these, meaning that 90 is vertically down?
The Speco for example: if it were to go to 0 then it looks like the lens would be half occluded, and 67 means it cannot look down? Seems they are using the opposite meaning.
The GeoVision can look vertically down but not horizontally out, so it reaches 15deg below horizon?
The Uniview can look above the horizon by 5 degrees then.

Any clarity is much appreciated!

Thank you

 

[Dan]

Hi @fport

Hikvision PTZ set 0° as the camera pointed straight down, and I had thought this was pretty common practice across most professional CCTV brands.

It does look like the Geovision might be the reverse (90° straight down).

I think for firm answers, you will have to ask the technical support of each brand to confirm.