IR Clarity of B/W 480 TV lines vs colour 540 TVL

by **kapten** » Tue Mar 09, 2010 3:06 am

I am trying to decide if it's worth purchasing a dual lense 1/3" Sony Super Had camera that uses a colour lense during the day and switches to a B/W 480 TVL lense at night. My other option is a standard colour 1/3" Sony Super HAD CCD with 540 TVL.

Given that IR gives an essentially B&W picture, would the clarity of the B&W lense (480TVL) be better, worse or around the same as a colour lense with 540TVL ?

**Sponsor**

by **ezcctv-support** » Tue Mar 09, 2010 4:23 pm

Hi,

Dose the single lens camera have an an IR cut filter or dose it change from day to night mode digitally

by **kapten** » Tue Mar 09, 2010 9:42 pm

ezcctv-support wrote:Hi,

Does the single lens camera have an an IR cut filter or does it change from day to night mode digitally?

As I didn't know, I decided to ask the the seller who responded with: "infrared lights will turn on when it gets dark, it does't do it digitally".

by **DJBlack** » Sun Jun 20, 2010 9:11 am

Hi - not sure if you are sorted yet, but will answer anyway.

These dual lens cameras are a cheap answer to the IR problem.

If you have a colour camera that provides correct colour rendition, it is very unlikley that it will be sensitive (ie see) IR.

Commercial cameras (as oposed to the many cheap "DIY") use a mechanical means to insert and remove an IR filter into the lens to sensor light path - that way the camera sees IR with the filter removed in darkness and true colour with it in the light path during the day.

There are electronic means to do this, but in my experience, only expensive cameras do this properly - cheap cameras usually go into a B&W mode by loosing the colur burst.

Anyway - hope that helps.

David