Anthony A.
n3wb
- Joined
- Jan 12, 2018
- Messages
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Any update on this cam?
I did find my 5231R-Z wasn't so good in total darkness zoomed out to the widest angle. The inbuilt IR has a definite hot spot in the centre- optimised for being zoomed in tighter. Near the edges of the FOV it was basically dark. My 2.8mm Hik DS-2CD2342WD-I (4mp) had better full screen night vision using it's in built IR in the same position.
I've got the DS-2CD2H35FWD-IZS up and it appears to have better IR spread at the widest FOV. (I haven't got it up where I found the 5231R-Z lacking in IR spread, nor have I bothered testing them side by side.) Not having a built in mic for the price sucks though!
Regarding the IR on the DS-2CD2H35FWD-IZS: I was playing with the manual IR settings and noticed Hik have got a "Low Beam" and "High Beam" setting (possibly not the exact terms used.) Think of it like car headlights- low beam gives you a wide spread (but shorter throw) for when the lens is at wide angles. High beam gives you a hot spot in the centre of the frame for when the lens is zoomed in and your subject is further away. You can manually set a mix of both sets of LED's at whatever levels you like. That's something the Dahua 5231R-Z is missing. I've got mine at a wide angle so turned the high beam right down to avoid a centre frame hot spot. I imagine the high beam would be very handy for lighting up subjects a long distance away.The IR spread seems very good to me, but I think you'll find any varifocal will suffer from poor IR coverage at the wider viewing angles. It does seem to be a lot better than a Dahau IPC-HDW5231R-Z Starlight I've got- that does suffer from virtually no IR illumination at the edges at wide angles. (Noting I haven't tested them back to back in the same locations.)
The DS-2CD2H35FWD-IZS does have IR LED's above and below the lens behind the dark tinted plastic- so a total of four LEDs.
The picture quality (focus, detail) is better than the DS-2CD2335FWD-I ultra low lights I've got.