Anykeeper lenses on Dahua IPC-HFW2100

[mroek 0]

Hi,

 

When I ordered my IPC-HFW2100 cameras, I was a bit unsure which lenses I should order, so I ordered cameras both with 3.6 mm and with 6 mm (from factory).

 

I also ordered some cheap 3rd-party lenses from Anykeeper just in case. I am generally happy with the cameras as-is, but one of the 3.6mm cameras was a bit blurry in the left edge of the image, so I decided that I'd test one of the 3.6 mm Anykeeper lenses that I had bought.

 

I opened up the camera, and compared the lenses. They were of identical length, but the front glass looks different, and the markings are a bit different too. Here's a comparison:

 

 

 

I mounted the Anykeeper-lens, and to my surprise it was quite a bit wider than the factory lens, even though they are both marked 3.6 mm. Anyway, I was happy with that, because I actually needed a slightly wider view anyway. The image quality is comparable, but I do think that the Anykeeper lens perhaps exhibits a bit more chromatic aberrations (pinkish shadows in highlights). Overall sharpness I'd say is pretty much the same, but I got rid of the left-side blurriness that I had with the factory lens.

 

IR-cut filter works the same as with the factory lens, so I'll keep the Anykeeper lens on this camera.

 

I am in no way affiliated with Anykeeper, I just thought it would be nice to inform the forum about it. The item I bought was the lens they call 3 megapixel.

[90beater 0]

I ordered a few myself since M12 is out of stock. I will reply once I get them inhand and test them.

[MaxIcon 0]

Interesting. It's possible the Anykeeper lenses from that batch are mis-marked, but specs on inexpensive Chinese gear are always a roll of the dice.

 

So, the question would be what the FOV appears to be for this lens. The specs say 85 degrees, which is typical for a 3.6mm 1/3" lens.

 

If you went to this page and plugged in the numbers (say, width of view at 10' out), it would come back with an estimate of the focal length.

http://www.pelco.com/sites/global/en/sales-and-support/downloads-and-tools/tools/lens-calc.page

 

Kind of a pain for a $5 lens, I know, but I like to figure out discrepancies like this.

[90beater 0]

The field of view is quite wider than I had expected. Here is a before and after from 10 feet.

 

 

[Kawboy12R 0]

I'd expect less distortion on a 3.6mm lens. That's quite the fancy boobytrap in front of the door though. Nobody sneaking in through that one without making some noise...

[vector18 1]

I'd love to see an image comparison between the dahua 3.6 lens and the anykeeper 3.6 lens.

So, what is the FOV from a 2mp with a 3.6 on the 15th floor? LOL.

 

 

[vector18 1]

or a 1.3mp with a 3.6 a few feet away about 15 feet high?