Focal Length 2.8mm can't be ordered.
There are technical problems that can't be solved.
There are technical problems that can't be solved.
Worlds First Review - Dahua DH-IPC-HFW5449T1-ASE+D2 - Dual Lens Full Color 2.0
- Thread starter Wildcat_1
- Start date
Quick update here for those interested in cost. I'm hearing this will be around the $230 mark initially. Tweaks are still being made on different versions of this cam so I'm awaiting an update on FW so I can test and then will post a new update here
Yes I was surprised. Don't get me wrong, still a fixed lens but with the tech behind it and dual lens config it really isn't an astronomical price when you consider the application of a cam like this and what it can help solve.
Parley
Known around here
Wildcat-1, did you confirm this specification on the close focus distance? I do not remember.
2.8mm - 2m (6.6ft)
3.6mm - 2m (6.6ft)
6mm - 2.5m (8.2ft)
@Parley I hadn’t posted that yet so let me answer it now
Yes I can confirm that these specs are accurate. In a single lens system a 2.8 could have a super close focus point but Dual Fusion tech relies heavily on alignment of both lenses and If you bring this too close or on the flip side focus this too far out, the harder it is to stitch accurately while still ending up with a usable aligned image. Hence there is a critical focus point or sweet spot where both lenses are aligned to ensure both of these requirements are met lead to an optimal cap.
Therefore all 3 cams are set very close in lens adjustment due to the requirements I mention above. Since the 2.8mm and 3.6 are so close in focal length these were dialed into the same Close Focus distance for optimal use at 6.6ft. The 6mm focused slightly further out as expected due to lens but still (in comparison to the approx 12ft you’d normally expect from a 6mm) is relatively close at 8.2 ft to ensure the tech works well in that config as too.
HTH
I wonder if these cams are best for places with marginal lighting? I've upgraded all my perimeter lighting so I can run all my 5442's in full color at 1/120 sec at night pretty nicely. I do see a nice difference with the 5442's in your split screen comparisons though. Would really like a turret though as they don't scream "camera" as much....
10DAYS Later will get 10pcs 3.6mm, 2.8mm this year no chance.
Just to recap for everyone the unit I test in this review IS the 3.6mm that Andy is getting stock in within 10 days.
jaocbsmith23
n3wb
This model support build in mic and speaker, so can do 2 way audio.
IPC-Color4K-X same too.
IPC-Color4K-X same too.
Parley
Known around here
CCTVCam
Known around here
- Sep 25, 2017
- 2,815
- 3,683
I'd be very surprised if there's ever a varifocal for this camera. The varifocal control for both lenses would have to be so precise to keep both lenses perfectly aligned that I doubt it's either possible or if it is, economic to achieve. It would also have to be so good as not to suffer drift over time. I imagine these will probably always be fixed focal length because of the limitations of alignment. Pleased to be proven wrong though.
Just got my sample from Dahua in - will post some screenshots this weekend of performance.
sebastiantombs
Known around here
The benefit was something we really were not expecting and also points out a limitation in some fields of view if you force a camera to color at night.
Here is the side-by-side with the current king 5442 in color:
Not only does it have a brighter image, but a limitation with running color on the 5442 is when someone gets close to the camera and possibly in front of the light that allows color, this dual camera will then pick up the person with IR and go B/W.
