The Z4 (you'd be better off with the 4MP version if nighttime is important) is 32mm vs the PTZ I show at 135mm
Point is dont believe the DORI numbers
Point is dont believe the DORI numbers
Would appreciate guidance on camera install locations
- Thread starter lipelliot
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At night, the numbers would be a quarter of that or worse given the MP/sensor ratio.
DORI is a nice tool in the tool box, but these numbers are under ideal situations with a marketing spin and real world experiences of DORI is that those numbers are established by the manufacturer and are based on best case scenarios like an object not moving and ideal light conditions.
Real world you should cut them in half during daytime and cut that half in half or more at night time for cameras on ideal MP/sensor ratios.
As an example, our long time resident camera expert Wildcat ran the Dahua 4K/X 8MP 1/1.2" sensor thru the paces. Keep in mind this 4K/X camera is incredible.
He had the 3.6mm version and here is the screenshot from 40 feet in the ideal daylight and standing still, which based on DORI numbers is the supposed IDENTIFY distance for this camera with the 3.6mm lens and I think most of would agree that this is not IDENTIFY quality, even if digitally zoomed in:
I have the 4K/X and 4K/T and they are incredible cameras, but I wouldn't use it for IDENTIFY past 15-20 feet, or half of what the DORI number is.
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So, at ~400-450ft, everything would be a useless blur?
Would that camera be fully zoomed in at that distance? DORI numbers show 1850/740/370/185, so real world daylight would be 925/370/185/92. Observe is just a little past ideal, and at night even Detect would be (worse than) questionable at 465.
If not that camera, is there another that would do better? obviously the 25x optical zoom would be idea, but that's ~$700. is there a bullet in a gentler price range?
Would that camera be fully zoomed in at that distance? DORI numbers show 1850/740/370/185, so real world daylight would be 925/370/185/92. Observe is just a little past ideal, and at night even Detect would be (worse than) questionable at 465.
If not that camera, is there another that would do better? obviously the 25x optical zoom would be idea, but that's ~$700. is there a bullet in a gentler price range?
I can guarantee you that the Z4E will not see 400 feet at night LOL. It will be likely all black.
For IDENTIFY, I prefer the Z4E not much past 60 feet.
As an example, many people opted for the Z4E to try to get plates at 70 feet and ended up swapping it out for the much more powerful Z12E.
The Z12E is double the focal length of the Z4E but it only works well at distance for plates. At 100 feet out for a person it is just a moving blob.
But if you are needing 400 feet, then a PTZ would be the choice.
For IDENTIFY, I prefer the Z4E not much past 60 feet.
As an example, many people opted for the Z4E to try to get plates at 70 feet and ended up swapping it out for the much more powerful Z12E.
The Z12E is double the focal length of the Z4E but it only works well at distance for plates. At 100 feet out for a person it is just a moving blob.
But if you are needing 400 feet, then a PTZ would be the choice.
I'm willing to concede that seeing the park at 450ft at night is not happening, but what if we adjust to Observable in daytime, then will one of the bullets be acceptable?
If "Observe" to you means "I think maybe I kinda saw something move but it could have been a shadow" then yeah.
Arrows at 300ft and 600ft
Arrows at 300ft and 600ft