16 replies to this topic

[isntworkdull]

Hi All,

i just wanted to check other peoples opinions here on HD-SDI cctv.

I recently purchased a HD-SDI camera and HD-SDI dvr, and i have to admit, during the day the images are amazing litterally like watching TV i suppose.

However i am dissapointed with the night vision, it is very fuzzy, i believe the correct term is "noise". Well theres loads of it, i would guess this image at night is basically useless.

The seller has told me this is normal, i even sent image snaps and he said it looks perfectly normal to him, that the night vision does suffer from "noise" and that is common with HD-SDI as they use CMOS sensors.

Any others can enlighten me on whether HD-SDI generally has bad quality night vision, or if i should be returning my camera for another...

thanks
James

[PeterJames]

isntworkdull, on 20 May 2012 - 06:56 PM, said:

Hi All,

i just wanted to check other peoples opinions here on HD-SDI cctv.

I recently purchased a HD-SDI camera and HD-SDI dvr, and i have to admit, during the day the images are amazing litterally like watching TV i suppose.

However i am dissapointed with the night vision, it is very fuzzy, i believe the correct term is "noise". Well theres loads of it, i would guess this image at night is basically useless.

The seller has told me this is normal, i even sent image snaps and he said it looks perfectly normal to him, that the night vision does suffer from "noise" and that is common with HD-SDI as they use CMOS sensors.

Any others can enlighten me on whether HD-SDI generally has bad quality night vision, or if i should be returning my camera for another...

thanks
James

What model and spec? I have used a few MP Mobotix Dalmier and Arecont cameras with mixed experiences, mostly good.

[RFS]

isntworkdull, on 20 May 2012 - 06:56 PM, said:

Hi All,

i just wanted to check other peoples opinions here on HD-SDI cctv.

I recently purchased a HD-SDI camera and HD-SDI dvr, and i have to admit, during the day the images are amazing litterally like watching TV i suppose.

However i am dissapointed with the night vision, it is very fuzzy, i believe the correct term is "noise". Well theres loads of it, i would guess this image at night is basically useless.

The seller has told me this is normal, i even sent image snaps and he said it looks perfectly normal to him, that the night vision does suffer from "noise" and that is common with HD-SDI as they use CMOS sensors.

Any others can enlighten me on whether HD-SDI generally has bad quality night vision, or if i should be returning my camera for another...

thanks
James

try posting an image here.

[isntworkdull]

Hi there

Just attached an image... as you can see, the image quality is terrible... and again i should point out in good light the image quality is amazing...



regards
James

Attached Files

•  20120520210819.jpg   182.21K   17 downloads

Edited by isntworkdull, 20 May 2012 - 08:14 PM.

[PeterJames]

are you using any IR light ?

[isntworkdull]

the camera has IRs built in... and they are on, i can see them...

But to be honest, i do not believe the camera can... i mean that is supposed to be an out door camera with 30 metres night vision... but its not very bright is it

i should point out that picture i just took over the network, which i think is limited to 720p... but even so, it doesnt look like 720p in night vision to me...

Edited by isntworkdull, 20 May 2012 - 08:26 PM.

[PeterJames]

Can you adjust the shutter speed?

[jameswilson]

You need some decent lighting. Built in lighting is always cheap and poor. Better than no lighting but not much. Add a decent emitter and you will be ok

Hd sdi is a good standard but it looks like you have low end cameras

[isntworkdull]

it does have a load of settings on the camera itself, via an OSD... i did play about with them when i was last testing it... and if i remember right there was a shutter speed... but i dont think i adjusted it...

Will be back in office tomorrow and will see what happens if i adjust that...

thanks for the tip

[PeterJames]

I see you avoided my question about the model and spec, I cant think of any branded HD with built in IR

[isntworkdull]

yes the camera was cheap off ebay... but the recorder was not... i was hoping to get away with some cheaper cameras... but looks like that was a mistake...

[jameswilson]

Yep

[isntworkdull]

sorry, didnt answer because it has no brand, was off ebay...

[PeterJames]

isntworkdull, on 20 May 2012 - 08:36 PM, said:

sorry, didnt answer because it has no brand, was off ebay...

Theres a clue to your dissapointment, Ebay is good for buying secondhand branded goods but swerve the cheap chinese toot

[Adi]

isntworkdull, on 20 May 2012 - 08:34 PM, said:

yes the camera was cheap off ebay... but the recorder was not... i was hoping to get away with some cheaper cameras... but looks like that was a mistake...

Doesnt work that way, never does.

You only need one ***** link in the chain and the system is pants.

[J_G]

 Adi, on 20 May 2012 - 09:50 PM, said:

Doesnt work that way, never does.

You only need one ***** link in the chain and the system is pants.

Lol!

[digitalwitness]

Generally HD-SDi should not be any poorer than MP IP at night as the sensors can be the same, taking similar quality cameras into account ofcourse.

Night performance of any Mega pixel camera has been their weak point for a long time, although it has improved significantly of the last few years. Compared to the same size sensor chip for analog, there are many more pixels crammed in which reduces their sensitivity to light.

Also the HD-SDi cameras I have seen appear to have roughly the same number of LEDs as analog equivalents, with 5 times the resolution this seems inadequate to me for anything other than close range, IP cameras the same story so not limited to HD-SDi.