dahua IPC-HDBW3300 lens

[strat 0]

Is it possible to change the lens on this cam to 2.8mm ?

 

By factory the only option listed is 3.3~12mm varifocal lens

 

would i be able to use something like this on it?

 

http://www.ebay.com/itm/LOT-5pcs-2-8mm-4mm-6mm-8mm-12mm-CCTV-CS-Mount-lens-/330129862747

[buellwinkle 0]

Varifocal lenses are considerable fatter than fixed lenses, so technically it will fit, but realistically you would just have a huge mess because the IR illuminators would reflect back in that gap and you would get a mess. But during the day it should be fine. BTW, for some reason, on Dahua cameras, you can't turn the IR leds off. You could in theory create a foam ring to seperate the two but it may be futile.

[strat 0]

So its best i find a CS mount lens with 2.8~12mm varifocal.. then it should be OK?

 

any tips where i can find one?

 

I have another camera here which is 2.8~12mm varifocal but not sure what mount it is.. will need to check.

 

PS: love your website has help me heaps before deciding on cams

[buellwinkle 0]

The lens on that camera has about 1/8" clearance from the dome to the edge of the lens. If it's a little close, say 1/16th of an inch, it will probably still work, if it's 1/16th of an inch too short, the rubber donut on top of the lens will not seal properly. If it's more than an 1/8" longer the dome will not close. I think it's risky proposition.

 

Search ebay for a 2.8-12mm varifocal auto iris mega and you'll find a small amount, 2 at the moment and see how both lenses are completely different sizes and shapes, how will you know which fits? Do you buy all of them? What if none fit? what if you find the right height but the diameter is off, then the rubber donut doesn't fit?

 

Your best bet may be to sell the camera on eBay and get something else that suits you. The Axis P33 series comes in what they call 6mm, meaning it has a 2.5mm-6mm lens and is available in various resolutions like 1M, 3MP and 5MP. I know it costs more, but it's a much better camera.