You are right that chasing pixels isn't always the best solution. You also have to look at the image sensor size. The larger the sensor, the more pixels you can pack onto the sensor and still get excellent low/no light performance. The problem with most "consumer" grade 4k cameras is that they use a very small sensor. Trying to pack that many pixels on a small sensor leads to terrible night time performance. The Dahua 5442 series offers 4mp resolution on a 1/1.8" sensor size. That is the highest number of pixels we recommend on a 1/1.8" sensor size. The IPC -Color4K-X camera has a larger sensor at 1/1.2" which means that even though it has more pixels (8mp vs 4mp) it still has excellent nighttime performance.Disclaimer: I haven't bought any cameras yet.
I see many recommendations for the 5442s and I think I understand why. Higher MP in a camera doesn't directly make for a better camera or for a better image.
At the same time, the reviews by Wildcat_1 featuring newer camera models make me wonder if an IPC-Color4K-X camera might not be a better proposition.
Am I missing something here?
You are right that chasing pixels isn't always the best solution. You also have to look at the image sensor size. The larger the sensor, the more pixels you can pack onto the sensor and still get excellent low/no light performance. The problem with most "consumer" grade 4k cameras is that they use a very small sensor. Trying to pack that many pixels on a small sensor leads to terrible night time performance. The Dahua 5442 series offers 4mp resolution on a 1/1.8" sensor size. That is the highest number of pixels we recommend on a 1/1.8" sensor size. The IPC -Color4K-X camera has a larger sensor at 1/1.2" which means that even though it has more pixels (8mp vs 4mp) it still has excellent nighttime performance.
The reason why we don't think the IPC -Color4K-X camera will work in your situation is the fact that it is currently only offered in 2.8mm and 3.6mm focal lengths. These are both pretty wide field of views (over 90 degrees). You won't be able to capture detailed enough footage at 50' away to be able to identify a stranger - daytime or nighttime. You need a much narrower field of view to ensure good detail at that distance. If they eventually make a Color4K-X camera in a more narrow focal length, then that would be the best solution. Unfortunately we have to make due with what's actually been released! The suggested Dahua model offers a variable focal length of 8mm-32mm. That's a lot more "zoomed" in than a 2.8mm or 3.6mm lens is going to offer.
That's not to say that you don't need/want a Color-4K-X camera in addition to the recommended Dauha model. For trying to cover anything out to about 25' from the camera, the Color-4K-X is arguably the best option currently. However since your stated goal is to capture detail out at the gate 50' away, it's not the right camera for that goal.
Yes.Not to steal this poster's thread, but if there was a varifocal IPC-Color-4K-X then I am assuming it would become much more attractive due to combining the best features of a 5442 with a higher-res sensor, is that correct?
Yes.Also, if I may, with narrower field of views (zoomed-in camera), doesn't the blind spot of the camera also increase (and move forward)?
Yes.
Yes.
The IPVM calculator that I linked earlier in the thread has a blind spot indicator that can help determine what the camera will be able to see. It definitely depends on the mounting height and angle (which are details you can enter into the calculator), but it does a pretty good job of estimating actual performance. You might be surprised at how "big" the blind spot gets as the field of view gets narrower.
Thanks again.
I have been playing with the IPVM calculator over the past week and realized that the camera mounting locations I have run wires to aren't ideal.
I am thinking about ordering a 5442 to get the FoV for each mounting location.
Any concerns with ordering all varifocals?
All the best.
See this thread on the importance of focal length of MP.
Nothing wrong ordering all varifocals. Once you get over the wide-angle see the whole neighborhood but can't IDENTIFY jack $#!+ then you will be glad you have a camera you can zoom in to a tighter field of view. Plus if you ever update cameras (which you will), then you have a varifocal that can be put somewhere else.
The Importance of Focal Length over MP in camera selection
At the urging of several folks here, I created a thread to show the importance of focal length and how focal length can be more important than megapixels (MP). I mentioned some of this in the post regarding The Hookup’s latest video demonstrating different cameras, including one sold from a...ipcamtalk.com