ColorVu 1/1.8"

[marzian]

I have 3 4K ColorVu cameras. I have been mightily impressed. Their low-light performance is from another world. Those have a 1/1.2" CMOS sensor, which explains the great low-light performance.
Has anybody had the opportunity to compare the 4K to the 4MP Colorvue cameras? The 4MP ones have 1/1.8" sensors.

 

[wittaj]

While a different brand, here is a post just today comparing the Dahua 4MP on the 1/1.8" versus the 4k on the 1/1.2" sensor:

Full Color Cameras worth it?

I've been using a couple HDW2431T-AS-S2 and they have been good, however looking to replace it with something that has 2 way talk and AI. I've had the HDW5541H on my list for a while but see there are now full color cameras like HDW3849H for around the same price. My current HDW2431T is a 3.6mm...

ipcamtalk.com

 

[marzian]

While a different brand, here is a post just today comparing the Dahua 4MP on the 1/1.8" versus the 4k on the 1/1.2" sensor:

Full Color Cameras worth it?

I've been using a couple HDW2431T-AS-S2 and they have been good, however looking to replace it with something that has 2 way talk and AI. I've had the HDW5541H on my list for a while but see there are now full color cameras like HDW3849H for around the same price. My current HDW2431T is a 3.6mm...

ipcamtalk.com

What is the difference between the NI and the other 4MP (non-NI) version?

 

[wittaj]

The NI version does not see infrared and has an F-stop of 1.0 compared to the other camera at F-stop 1.6

 

[EMPIRETECANDY]

@marzian
@Wildcat_1 make some compare for Color4K-X with the colorvu 4K. Currently the 4K 1/1.2cmos is working better than the 4mp full color ones. No matter hikvision or dahua.
But based on budget, those 4mp turret also working bit good.

 

[alastairstevenson]

Has anybody had the opportunity to compare the 4K to the 4MP Colorvue cameras?

A couple of comparison stills here :

Initial review of the Hikvision DS-2CD2087G2-L(U) ColorVu 4K 8MP IP bullet camera.

This is an initial review of the interesting Hikvision DS-2CD2087G2-L(U) ColorVu 4K 8MP IP bullet camera, linked to the marketing terms ColorVu 2.0 and Accusense 2.0 It’s a new model that’s already created a lot of interest on the forum. The intention is to not overlap or duplicate the various...

ipcamtalk.com

 

[marzian]

It does look like the 4K version performs better in very low light, though the 4MP versions are still ar superior to their older counterparts.

 

[alastairstevenson]

It does look like the 4K version performs better in very low light, though the 4MP versions are still ar superior to their older counterparts.

I agree, if you look closely at the 1/1000 second exposure images, the DS-2CD2087G2-L is marginally better, though it has a 6mm lens against the 4mm of the other 2 in that comparison.
But a worthwhile advantage is the 8MP resolution, allowing more digital zoom.

 

[Wildcat_1]

Yes as @EMPIRETECANDY mentioned, in my testing of full color 4Ks vs their 4MP full color siblings, the 4Ks win out for sure thanks to their low light processing capabilities afforded by the larger 1/1.2” they possess. The 4MP cams have come on a long way with the Dahua 5442 being a star performer for sure and the full color 4MP handling night (in color) better than even the 5442 could. However, still relying on 1/1.8” does limit light gathering AND introduces more noise than the larger sensor.

Just remember, sensor is important, I never advocate for just increasing pixel density across a smaller sensor which has happened across many manufacturers on earlier 4K builds but we’re now starting to see higher performing cams utilizing improved SOCs, optimal 1/1.2” sensors and low dispersion optics.

Dont get me wrong, I’m not saying deploy these everywhere and certainly don’t expect miracles if FOVs are completely dark You still need light to bring out the best, are better off balancing a location with blended cams (4K full color + dual lens or decent 4MP with IR across the location), ensuring you install for the target type and special applications you need to cater for (LPR, face recog, PTZ etc) along with always dialing in for the FOV correctly. The benefit now though is you have more latitude and options due to these new cams like the Color4K-X.

 

[Mike A.]

And it's a different sensor and signal processing too. Likely more sensitive from the difference seen.