Dahua 4K Micro 4/3 Camera Tested (IPC-HF8835F)

IPVMU Certified

FWIW, several people have tried alternate lenses here with varying degrees of success.

The camera has an (auto) back focus adjustment, yes?

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John Honovich

IPVM

Btw, lol at this:

A direct from Asia seller on IPCamTalk is selling it at 1/2 of what the USA price is. Quite the channel management.

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Ethan Ace

In reply to John Honovich

There are prices as low as $399 on Alibaba.

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Ethan Ace

It has a button on the camera and in the web interface that says auto focus, yes. But they didn't do anything in our tests.

I believe it's auto focus, not auto back focus, and aimed at driving motorized lenses, but that simply didn't work. If it were auto back focus, we would've heard the imager move.

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Undisclosed #1

IPVMU Certified

I believe it's auto focus, not auto back focus, and aimed at driving motorized lenses, but that simply didn't work. If it were auto back focus, we would've heard the imager move.

Is their lens motorized?

Maybe there is a m43 equivalent of the c to cs adapter ring :)

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Ethan Ace

No, it is not.

There are M43 to other lens type adapters, but it's even less realistic to expect that users would purchase an EF lens just to adapt it to this camera, given the price tag of low F stop EF lenses, often $1,000+.

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Undisclosed #1

IPVMU Certified

There are M43 to other lens type adapters...

No, I meant like a spacer ring to extend the focal length without changing the threads, like a c-cs spacer. Half joking as well.

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Undisclosed #1

•Apr 04, 2018

IPVMU Certified

No, it is not.

The A&E doc does claim it:

Curiously the official image seems to show a different lens, a SLR Magic f1.6:

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Ethan Ace

In reply to Undisclosed Manufacturer #2

Also interesting in that link is multiple people testing EF lenses with adapters with the camera. I really do not see why others should not work, and was baffled when the other lens we tried did not.

Regardless, Dahua flat out says it does not support other lenses, so it's a use at your own risk situation.

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Undisclosed Manufacturer #2

•Apr 04, 2018

I tried different manual focus lenses and it worked fine. Strange.

Also, next time you can check Dahua Accessorie selector, you will get all lens options. Currently there are two models from Dahua available and I prefer this one, much more light.

PFL2070-J12M

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Ethan Ace

•Apr 04, 2018

Thanks for that link. That is a much more reasonable F-Stop and AOV. Unfortunately, that lens is not yet shipping in NA, and tech support wasn't even aware of it. We will keep an eye out for it and update here when it's available to us.

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Undisclosed Manufacturer #2

This is the vari focal lens on HDCVI version of this camera: LEns for 4/3" Dahua camera

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(3)

Tony Lagan

Looking at our pricelists there is a varifocal lens for this camera too. I will try to get more details and post them later.

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Tony Lagan

•Apr 10, 2018

In reply to Tony Lagan

The lens is a DH-PFL2070-J12M which is a 20 to 70mm varifocal lens.

Some Specs.

Model		DH-PFL2070-J12M
Parameter
Image format		4/3”
Focal length		20~70mm
Lens pixel		12MP
Aperture		F1.5
Mount		M43
Field Angle (DHV)	4096*2160(17:9)	W: 55°x 48.1°x 24.9°
		T: 17.9°x 15.9°x 8.4°
	3704*2778(4:3)	W: 55°x 43.3°x 32.2°
		T: 17.9°x 14.4°x 10.8°
	3840*2160(16:9)	W: 52.1°x 45°x 24.9°
		T: 17°x 14.9°x 8.4°
Lens Control	Focus	Manual
	Iris	Manual
IR Correction		No
M.O.D.		3m(9.84ft)
Dimension		ɸ73x149.2mm(ɸ2.87”x5.87”)
Weight		0.99kg(2.18lb)
Operating temperature		-30℃～+70℃(-22℉~158℉)
Humidity		<90% RH

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Robert Shih

Independent

Is this a Nova or Nova2 chipset/firmware or something entirely different? I don't see this version correlating with anything I have on hand.

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Ethan Ace

In reply to Robert Shih

It's Nova2 from the wiki.

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Robert Shih

Independent

DH_IPC-HX8XXX-Wei-Nova2_EngSpnFrn_N_Stream3_V2.622.0000001.2.R.171115

Oooh, looks like it's a new chipset. Not a pure Nova2....I wonder what the "Wei" portion is for.

My curiosity is piqued. Time to bug a few engineers @ Dahua.

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Ethan Ace

Note: We originally listed the F-stop of the Axis 10-22mm lens as 2.8, but it is actually 3.5, an even greater difference compared to the F1.2/F1.4 lenses used in past tests. We've corrected this above.

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Rafael Oneda

I didn't understand why to do a comparison between 4K, 20MP and 1080p cameras.. is almost like to compare bananas and watermelons, does not make sense. I think the right Axis camera to be compared with Dahua HF8835F is P1368, dont you think?
Of course the 20MP sensor camera will perform worst in dark and will generate a biger net troughput.

I would like to see a Axis Q1659 vs Avigilon 24L-H4PRO-B super hight resolution cameras comparison. It would be interesting.

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John Honovich