IR compatible vs IR corrected lenses?

[davekra]

Greetings,
I'm replacing a 7 camera analog system with Hikvision IP cameras and iVMS4200.
Right now I've only got one 3mp bullet (DS-2CD2032) with a 4mm lens and have been playing with it in the basement.
I'd like to play with different lenses and was doing some reading about different focal lengths of visible and IR light.
I found that there is special glass that does better at focusing both lights at the same place and was hoping to find a source for them.
Some of the sites say they are IR compatible...does that mean IR corrected?
Does anyone have information or sources for lenses that do well in visible and IR?

Thanks,
davidk

 

[nayr]

almost all CCTV lenses should be IR corrected, or they would have to be re-focused at night vs day..

 

[davekra]

Thanks,
I was hoping that was true, I just wasn't seeing it called out on the specs of some lenses.