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  1. wopi82

    Dahua Color 4K-X in-depth review

    Hi everyone, today I present you a review of recently announced Dahua Color 4K-X camera. This is a 4K resolution model with ultra bright f1.0 lens and huge 1/1.2” sensor. The combination of bright lens and such big CMOS, promises excellent image quality both in broad daylight as well as at...
  2. wopi82

    Dahua T5442T-ZE in-depth review

    Hi guys, Today I present you a review of Dahua T5442T-ZE. This model is equipped with 2.7-12mm zoom lens and an excellent 4 megapixel 1/1.8 inch CMOS sensor. Compared to 5442TM-AS-LED and 5442TM-AS models, which I’ve already reviewed, this one has twice as much RAM available. The housing is...
  3. wopi82

    Review of Dahua NVR5208-8P-4KS2E + Dahua HFW7842H-Z cooperation

    I hate to hear my recorded voice. And my spoken language really sucks. Just turn down the volume if you can't stand it ;)
  4. wopi82

    Anyone interested in reviews of other brands?

    Hi everyone. It's over 3 years I've joined this forum. During this time I had a chance to learn a lot from other users experience, as well as share some of my knowledge. My reviews of Dahua cameras, gained great interest from all of you. Common Issues Guide also had a lot of positive feedback as...
  5. wopi82

    Multiple camera low light test

    Corona virus is spreading all over the world, and so we're all forced to stay home. Here in Poland all shopping centers, schools, kindergarten, playgrounds, etc. are closed. So, together with my wife, we have to find way, to do our regular job, and take care of children. It is time consuming and...
  6. wopi82

    How to bypass video compression in Dahua camera

    Currently I’m testing Dahua IPC-HFW7842H-Z. Hopefully the review will be ready soon, but there is still plenty to do, and I have to find time to put all material together. Anyway, while testing the camera, I’ve found something I was thinking about since my first Dahua I bought. That is, how to...
  7. wopi82

    Common issues with camera image

    Here is a quick guide to what might go wrong with the image of your cctv camera, and how to fix this. MOTION BLUR: This is probably the most common issue, new camera owners run into. Many times on this forum I've seen posts like: "I bought a set of cameras recently. The image looks great on...
  8. wopi82

    Dahua T5442TM-AS quick review

    Hi folks. I bought a set of T5442TM-ASs from Andy, so here is a quick review of this model. This camera is identical to T5442TM-AS-LED, which I reviewed here some time ago. The only difference is that this one owns infrared LEDs instead of white light LEDs, and has an ICR (removable IR filter)...
  9. wopi82

    smart IR issue explained

    I decided to write this thread, as there is more and more rumor about Smart IR function on the forum, and it seems to me that most users have a false vision of how it should work and what’s its main porpoise. Unfortunately even such services as IPVM suggest in some of its reviews, that smartIR...
  10. wopi82

    Dahua IPC-T5442TM-AS-LED review

    Hi everyone. Today I present you a review of full color starlight+ camera, Dahua IPC-T5442TM-AS-LED. I got this one from Andy in exchange for in-depth review. Thank you Andy :) This is a 4 megapixel, turret type camera with white light illumination. It is equipped with 1/1.8-inch type CMOS...
  11. wopi82

    Dahua in extreme weather conditions

    This is how a Dahua setup behaves when straight line wind strikes: This is a gust front before the thunderstorm in Poland last month. I will mark, that each roof tile weighs 4-5kg
  12. wopi82

    How warm is Dahua cam?

    Here are some thermal images, done with FLIR camera of my HDW4231EM-AS and HDW5831R-ZE cams. The air temperature was exactly 3.3 Celsius degrees (38 Fahrenheit). No wind or sun influence (it was overcast day). So if you are worried, that you camera can freeze in low temperatures… stay cool :D...
  13. wopi82

    Periodic Table of Image Sensors Not all sensors are listed, but it gives a nice overview of sensor types and manufacturers. And it looks cool :D
  14. wopi82

    Pre-event recording to SD card

    Hi all. I’ve been using Dahua cams for a 1.5 year now, and I’m pretty happy with this equipment. There is however one thing that is bothering me. I use my cams only with micro SD cards. It makes the system as simple as possible. Every cam is powered by separate 12V UPS, which makes every cam...
  15. wopi82

    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...
  16. wopi82

    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...
  17. wopi82

    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...
  18. wopi82

    Dahua HDW5831R-ZE review

    Hi everyone. This time I would like to present you a review of Dahua HDW5831R-ZE. This is my second security camera. The first one is HDW4231EM-AS the review of which can be found here. I purchased HDW4231EM-AS from official Polish reseller while the second one was bought directly from Andy...
  19. wopi82

    Sensors used in Dahua cams

    Hello everyone, I did a diagram showing all the sensors used in Eco Savvy 3.0 and Ultra series from Dahua. The diagram shows sensor size in relation to other sensors as well as camera models, using certain sensor. No PTZ models included and no box cameras – apart from IPC-HF8835F, which is the...
  20. wopi82

    Infrared focus shift - explanation

    While reading the forum's threads, I found some posts with complains about soft image while the camera is going from color to IR or the opposite. In this Testing roundup IPC-HDBW4431EP-AS versus IPC-HDBW5431E-Z thread, TVT73 is complaining about soft focus in IPC-HDBW4431EP-AS camera. Here Any...
  21. wopi82

    Dahua IPC-HDW4231EM-AS review

    I've been playing with Dahua IPC-HDW4231EM-AS for a few months, so I've decided to share with you some thoughts about it. Maybe it will be helpful for somebody willing to buy a CCTV camera. First, some background. As a total beginner in the topic of security cams, before deciding on the camera...