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Dahua HFW-1831E in-depth review
I present you a review of HFW-1831E camera. This is a h265 Lite series model, most likely equipped with fairly new IMX334 Sony sensor. This is a 1/1.8 inch, 8 megapixel CMOS with a pixel size of 2 micrometers. I got a model with 4mm lens, giving a horizontal FOV of around 87 degrees. I will... -
What is causing this pulsating video (DH-SD59225U-HNI)
Sorry, but this is not true. VBR is meant to keep your file smaller, while trying to keep motion parts of the image in better quality than static scenes. In case of Dahua this is only 1-pass VBR so coding is based on average quality setting, and not analysis of footage like in case of 2-pass... -
What is causing this pulsating video (DH-SD59225U-HNI)
Nothing to worry about. You just messed up codec settings. Your image is loaded with ton of detail (ruble on the road, grass, pouring rain) and you use ridiculously low bitrate. So the codec freaks out. First turn on smart codec. Secondly, always use constant bitrate and set I frames to 20... -
(8MP) IPC-HFW1831E Review
Is it possible do downgrade the firmware? I've updated from 2.622.0000000.4.R to 2.622.0000000.8.R and lost high bitrate settings. The reseting time stamp has been fixed but now even if i set a custom bitrate to maximum 15104kbps the real bitrate is around 9000kbps and the image really suffers... -
(8MP) IPC-HFW1831E Review
@Burton_Flooring Thanks a lot. It worked. I still have lot of glitches in recorded files, but at least it's mp4 and I have a working motion detection. I actually used smartPSS for a long time for downloading timelapse snaps from 4231, but I didn't know it can act as a PC-NVR. Now I can do some... -
(8MP) IPC-HFW1831E Review
Unfortunately no. I have serious issues with getting a proper video material for moving objects comparison, to put into editing program (After Effects). This cam has no SD card slot. So the only option for me is too sit in front of the PC screen and "catch" some situations with live recording... -
Dahua 4k Starlight with 1/2 sensor (CVI only for now)
I was on vacation for some time. Actually I got HFW1831E from Andy instead of HFW2831T-ZE. Started testing on monday. The results are much better than I thought they will be. Right now I'm comparing it to 5831R-ZE but I also need to put it next to 4231EM-AS. One thing I'm really really happy is... -
Dahua 4k Starlight with 1/2 sensor (CVI only for now)
Sorry, it is indeed recording 4K. Dpreview web page is full of mistakes :) I've got an access to A7S II. Maybe I'll add some comparison when testing HFW2831T-ZS :P -
Dahua 4k Starlight with 1/2 sensor (CVI only for now)
@CCTVCam A7s is a fairly old camera announced back in 2014. There is already A7SIII on the market. I wouldn't compare it to any CCTV cam, as its a full frame sensor camera. Its sensor area is 35 times larger than 1/2.5 inch sensor from for example HDW5831R-Z. Also consider that while the... -
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Dahua HFW4239T-ASE review
@tangent True, it might be IMX327. There is no information confirming it's one or the other. But given that both 4239 and 4231 exhibit similar noise levels at adequate gain levels (same image brightness) it seems to me, it's still IMX290. The IMX327 is said to have better low light performance... -
Dahua HFW4239T-ASE review
Both are based on IMX290. No IR light was used. -
Dahua HFW4239T-ASE review
As requested by Korgoth, here is a quick comparison of 4231 and 4239 in motion: -
Dahua HFW4239T-ASE review
@Korgoth You are right, I should present some moving objects. I’ll give it a go when I’ll have some spare time. However I cannot agree with what you’ve wrote about sensor sensitivity. It is not true, the sensor becomes more sensitive when switching camera to BW mode. A color sensor has a color... -
Dahua HFW4239T-ASE review
I've just contacted Dahua Poland. They wrote, this is a mistake on a webpage. There is indeed no ICR in this model. They also told me, there will be another model of this cam, equipped with white LEDs. -
Dahua HFW4239T-ASE review
Hi everyone. I’m pleased to present you a review of new product from Dahua, the HFW4239T-ASE. This camera was announced by Dahua in first week of may 2018. I’ve ordered it from Andy, who luckily had it already in stock for good price. Shipping was very fast, and took around 10 days. This is... -
Dahua sky watching camera recommendation?
@wcleme11 Let's say I'm 85% sure :) There is no certain info about sensors used in these cameras. However Dahua is "kind enough" to give some hints, allowing to deduce what's inside. There is indeed no information on Dahua's page that this 8MP sensor is Sony Starvis , but this camera model has... -
Dahua sky watching camera recommendation?
Both HF8835F and HFW8232E-ZE own SONY sensors. 8835 uses IMX294CJK while 8232 uses IMX185. The only other option for 8MP 4/3 inch sensor comes from OnSemi. But these are all CCDs, not CMOS. OmniVision has no such units. HFW4239T-ASE will be im my hands on monday. I'll start testing as soon as... -
IPC-HFW4239T-ASE
I'll do my best ;) But you need to wait a bit. Shipping will take at least 2 weeks, and than I need some time to test it. And time is what I really miss lately. -
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Dahua IPC-HDW4431C-A review
Hi everyone. This time I present you a quick review of Dahua HDW4431C-A. This is an official Chinese market model, not available in Europe and presumably nor in US. My friend bought two of these cams on Polish auction service for $80 each, so I decided to take one for quick testing. The box is... -
Dahua HDW5831R-ZE review
I didn't say 5831 outperforms 4231. It's only able to give brighter image at night due to faster lens. The noise level is higher at 8MP no matter what. -
New starlight fixed lens dome and bullet 0.001lux.
They do have B/W mode with removable IR filter. Only no IR leds. -
Dahua HDW5831R-ZE review
@Heire In most cases there is a description at the top of images, where I give info about noise reduction. I used mostly DNR 50 and 30. I don’t understand the sentence: What do you mean? A clear image is better. Isn’t it? If there is too much noise, the image is deprived of detail and codec... -
Dahua 3mp starlights
These are just updates to previous models. They added ePoE. Everything else is the same. -
Dahua HDW5831R-ZE review
What's DOL WDR? | Technology News D-WDR vs WDR vs BLC technology | Technology News -
Dahua HDW5831R-ZE review
I'm talking about the difference between HDW5830R-Z and HDW5831R-ZE -
Dahua HDW5831R-ZE review
Very certain reason. ZE supports WDR (DOL) while Z only supports Digital WDR. That's strange, because they both use same sensor.