Fresnel Aputure

To which, this member said that it doesn't "really" do that. Wait, what? This is a finite, mathematically expressed statement. It either does or doesn't, and math is the only truthful, finite language devoid of ambiguity.

Light Meters. Light meters for measuring visible light intensity. Sort:.

Many cameras in the security industry offer variable frame rates based on the resolution choice or sometimes other features.

Intel's system (at least years ago) to differentiate the clock speeds was based on impedance, corresponding heats at higher speeds, which compelled them to impose a clock cycle for the CPU in question based on it's performance, in the variations of manufacturing.

In a reflected ray there are no electric field vectors that are parallel to the refracted ray because it is the propagation direction of the wave. The only ...

The project was just approved yesterday with Dahua cameras. This is a HOA, and there is nothing critical on the network. They do not care. I think it is important to realize some customers are not concerned and that is primarily based on the client type/size.

The glint in Gallichotte’s eyes reflects the setting sun as he becomes more animated in the telling of their 2018 mailbox creation story: the purchase of reference books, hours of careful research, the need for authenticity, the acquisition of a Fresnel lens.

Dahua's track record shows that you are risking hitting all types of problems and headaches using them. The professionals, e.g., who buy premium priced products are not all stupid, there is a reason why people pay a premium for what you consider inferior technology and that is because those competitors have a much better track record of delivering what they claim and not subjecting their customers to future problems.

The "undisclosed manufacture" above seems biased; he's literally pretending the term AT doesn't connect the two specifications to one another.

Hikvision 4k basic models... ...and had someone mention Milestone ... which seems very very interesting. I have a NAS which supports iSCSI, so I might try out the free version but I think I have to ultimately get a paid version because I want more than 8 cameras.

2.2.2.1 Parabolic Trough (PT). The Sun's rays are directed toward the heat receivers located at the central line of parabolic mirrors. The receiver surfaces are ...

Before the 11 a.m. boat ride back to the mainland, Dre Elmore likes to show off the retired Fresnel lens and the array of still-working machinery in the fog signal building.

Fresnel pronunciation

As you said, yeah, it's possible they think the rest of the planet's people will not care as much as one continent does - and thus, have two manufacturing processes as though THAT would be a cost savings.

To which, this member said that it doesn't "really" do that. Wait, what? This is a finite, mathematically expressed statement. It either does or doesn't, and math is the only truthful, finite language devoid of ambiguity.

You have already made it clear in the previous discussion that you are 100% committed to Dahua (e.g.,Looking For NVR To Record UHD Cameras And Work With A NAS) despite our concerns already expressed.

What I read from the Dahua US site was shown and clearly stated that they offer 12MP/20 or 4K/30.  4K is considered UHD in this industry.

I GET that WDR is subject to spurious claims which contain subjectivism; but a resolution is counted numerically; and the number of frames which can have different pixel content is numeric. These are finite, clear commitments.

Fresnel lens

May 1, 2023 — Get closer to the subject, concentrate on the area of the subject that you want to be razor-sharp, and use large focal lengths (from 70mm) and ...

I'd bet you're bereft of a scintilla of specific knowledge of this Dahua model (*81230*) or any with that root identifier in it.

Fresnel equation

For instance, a device* that claims 4k 30fps might only be able to do so with WDR off, a certain CODEC, no motion detection, no substreams and when connected to its own brand recorder.

IPVM is the world's authority on physical security technology, profiled by Time, The Atlantic, Wired and collaborated with the BBC, NY Times, Reuters, WaPo, WSJ, and more.

Fresnel company

Yes, I'll bet that scenarios exist which pose problems for the engine, gets hot, slacks off, resumes again -- after all, H.265 is even hard for the $2500 laptop I use. BUT, these cameras have the "luxury" of specificity, instead of generalized demands for performance, which must be hard on computers.

In my discussion of products I'm getting, I mentioned (in a thread) that I wanted units which did 4k at 30FPS. These are H.265+ cameras, which have a MAX bit rate of 10Mb... and a single (healthy) 3.5" hard drive does 150+ MB/s...

To make sure people can't waste your life with absurd claims, science has adopted a principle; the person MAKING the claim - assumes the burden of justifying it. You sir, have adopted the burden of proof!

The first such lenses were invented by the French scientist Augustin-Jean Fresnel in 1819 to provide lightweight lenses for lighthouses.

I have to agree with Jay, primarily because typically when I install any product it has been selected based on what I am protecting.  Would I install Dahua in a high risk, asset location?  HECK NO!  Would I install Dahua at a local HOA sure, why not? Of course, I'll take the necessary precautions (as standard procedure when using Dahua).

Fresnel Blender

However,  mfr#2 is not making a claim himself, but rather relaying a statement from Dahua, and so has no burden of proof, except that in regards to correctly echoing the statement, if so challenged.

Vision Allied Health Institute Certified/Geriatric Nursing Assistant training program is to enhance wellness through comprehensive theory and extensive ...

Truman, Dahua devices right now are in the middle of a global hack attack (e.g., 1). It is just the latest in an almost never ending string of problems Dahua has.

Earlier, I had stated the industry had for some time, several vague concepts including the simple difference between IPS and FPS or measuring light requirements with LUX or Lumens.

IF he has proof they're lying, PROVIDE IT. But alleging it without proof is dishonorable unless he can provide the evidence to support it.

And if not Dahua.... I want H.265+ (plus is showing HUGE improvements of efficiency in my testing so far), 4k (PPF... this is what's good for me), and 30 FPS is my hope. MAYBE 25 is okay... but I'd prefer 60! :)

Jul 11, 2023 — 365 nm VS 395 nm ... Although both 365 nm and 395 nm are UVA lights, and produce black light and curing effects, and there is only a 30 nm ...

Fresnel effect

Truman, let me make clear, if I haven't yet, that your expectation that the Dahua spec "UHD @ 30FPS", is a truth-bearer, is also one shared by myself.

On the other hand, maybe you don't care about substreams etc, all you need is 4k 30fps, so it's important to find out the subjective motivation for the statement.

Dahua asserts directly by use of the @ symbol, that those two specifications are Dahua's direct claim of the frames per second and the resolution it'd be transmitted at. I bet they even tested this.

I searched the US site, not HK and see the 12MP at 20IPS and 4K at 30IPS.  4K is UHD so I wonder if the HK version is the same.  You don't need 12MP for UHD.

I'll happily install a product that I've had no issues with (for example, Dahua), in the past 3 years.  Heck, I've even got Dahua installed at home (along with Mobotix).  So yeah, why not?

Sep 24, 2020 — The lateral (X-Y) resolution of fluorescence and Raman microscopes is frequently calculated using the famous Rayleigh Criterion for ...

Fresnel Light

Thorlabs designs and manufactures system-level solutions as well as building-blocks for the industry, including optomechanics, motion control, ...

Mar 4, 2023 — Additionally, AR coatings make the lenses nearly invisible, thereby improving the cosmetic appearance of the glasses. They also help in reducing ...

I was at a board meeting last week and they asked, what brand of cameras are we selling. I told them Dahua, even spelled it out nice and slow. For the first time ever, I got feed back on the hack. They googled the camera and read about the hacks. My contact told me he talked to the person with the concern and squashed their concern. I advised him we change all the default ports, and passwords. I also offered him a VPN solution, which he denied.

All of those are true, just not st the same time.  Marketing at its finest and still out there a bit.   My experience with Dahua 4K cameras is 20FPS in 4K mode, 30FPS in lower resolutions.

CNC Glass processing center is designed for glass edging, glass drilling, glass milling and glass polishing for straight and shape glasses automatically.

My reference to HK was Hong Kong as I read a few statements about your desire to buy from outside the US in your other post.

Before the 11 a.m. boat ride back to the mainland, Dre Elmore likes to show off the retired Fresnel lens and the array of still-working machinery in the fog signal building.

They're counter suggestions were H.264 Axis cameras, which I wouldn't be surprised if they were better. I'd bet everyone here knows more than I do across the board of surveillance - and would only have some trouble if I could choose very specific subjects from which to debate knowledge.

Philosophy urges us all to defend against self deception; confirmation bias. Hypocrisy (you'd be pissed if someone critiqued your product and without proof... and I'd be grateful to anyone who studied my product enough to find the problems with it! This is expensive stuff to do.

Or it might deliver the 30 frames in a second, but those frames may come in juttery spurts, causing the video to appear choppy.

That was a problem in marketing and it was addressed by IPVM in the early years if you read back on Arecont and Avigilon.  Most manufacturers seem to be more clear now.

But Dahua's statements seem like one's that lend themselves to epistemic claims. How is this errant? I DON'T, get it. What can I trust if not numbers that are expressions of unambiguous, discrete events?