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Cameras

Whether it's a photo of a new baby, a wedding or a day at the beach, cameras help us record and remember life's memories. Ask questions about the camera's history and function here.

6,430 Questions

What is the speed of electricity?

The speed of an electric current is determined according to v = I/nAQ (average speed equals current divided by the number of charged particles moving, the cross-sectional area of the conductor and the charge of the particles). This basically means that a normal current e.g. the current in a house's wiring travels at about walking pace.

If a telescope with an objective lens of ten feet focal length is used with an eye piece of one quarter inch focal length what would the resulting magnification be?

The magnification (MA) equals the focal length of the objective lens (fo) divided by the focal length of the eyepiece (fe), which is this: MA = fo / fe = 10 feet / .25 inches = 120 inches / .25 inches = 480 A link to the Wikipedia article on magnification is included.

How many smoke detectors on a circuit breaker?

While smoke detectors draw very little power, you can only put a certain amount on a circuit. This is determined by the manufacturer's specifications which must ALWAYS be consulted. Some manufacturers only allow 9 per a circuit, others 11, and some brands may even be more. If you were to try to put more than the designated amount on that circuit, the detectors would not work as they were designed to, and most certainly would not pass a fire inspection. If it is a large house that a system is being installed in, a low-voltage system is always the best way to go.

As a side-note, just because a given device only uses so much power, the National Electrical Code (NEC) still has guidelines that MUST be followed. A "continuous load" as defined by the NEC is something that stays on for more than 3 hours at a time - and it states that you can't load a circuit more than 80% of its capacity.

Lighting is a perfect example, so let's use light bulbs as an analogy.

A 60-watt light bulb uses .5 amps at 120 volts (60 watts divided by 120 volts is .5 amps). Therefore, on a 15 amp circuit, you would think that you're able to put 30 of these 60-watt light fixtures on a circuit, right? Actually, no.

Lighting is most certainly considered a continuous load, because you definitely leave your lights on for more than 3 hours at a time. Therefore, per the Code, that circuit can only accept 80% of its capacity because of the continuous load, leaving you with 12 amps (80% of 15). This means that you can only use 24 of those 60 watt fixtures, not 30.

Wiring is not a hobby - always hire a licensed and qualified electrician.

How does light travel through a camera?

The Lens is the image-forming device on a camera. The lens bends light rays to project an image onto a light sensitive medium, which may be any of several forms, including film, sensitized glass plate, or electronic sensor.

The Diaphragm is a variable opening which controls the quantity (brightness) of light falling on the light sensitive medium.

The Shutter controls the length of time light is permitted to fall on the light sensitive medium. It can take many forms, but usually has some method for precision adjustment of the time it is open.

Light passing through the lens, aperture, and (when open) the shutter forms an image of specific brightness for a specific duration on the light sensitive medium.

Light also passes through a viewfinder system, which may be a part of the optical system of the camera, or separate from it. In the most complex cameras, some of the light passing through the lens is diverted into a viewfinder by means of a mirror or prism. By using some of the same light passing into the camera, these systems permit the user to see essentially what the camera is seeing.

(See discussion)

How do you rewire a switch in a hallway that turns lights on and off in two bedrooms?

Are you wanting to reconfigure it to work this way, or does it currently work in this manner?

To reconfigure it, it will take quite a bit of rewiring, depending on whether the rooms are adjacent or not.

The wiring method is not terribly difficult. Getting the wires to and from the switch can be cumbersome though.

What is the population of catanduanes?

As of 2020, the estimated population of Catanduanes is around 270,000 people. The province is known for its natural beauty and unique geographical features.

What would be the point in installing a wireless security camera system?

Installing a wireless security camera system can be a great solution, especially in situations where running wires is not feasible. While wired systems are generally more reliable, there are high-quality wireless options available in the market. I’ve had experience installing Camius wireless security cameras with a DVR, and they are truly wireless and completely wire-free. The cameras are 4K resolution, audio live feed, and recording, alerts to your phone, 2 way audio, they also have a siren and lights which are useful at night or if you are away as a deterrent.

  • The wireless range of these cameras is impressively strong, eliminating any intermittence between the cameras and a Wi-Fi router. This is because the wireless range is between the camera and the Camius NVR recorder, which also acts as a wireless hub.
  • You connect the router to the Camius recorder using the LAN port if you need remote access when you are not at home. You can also this system just for live monitoring connecting the recorder to the TV using HDMI port,
  • These cameras come with pedestrian detection and record on motion, which saves on battery life and hard drive space. You can connect the NVR to the monitor via HDMI for a larger view, and they also offer a browser view and a Camius view app for remote access.

100% cordless security system with a very quick setup in minutes.

How does an underwater rebreather work?

Basically, when you breathe in air from regular SCUBA gear, only about a fourth of the oxygen you breathe gets inhaled. So in a rebreather, the rest of the air and the carbon dioxide goes through a scrubbing system of calcium and sodium hydroxide. Then it goes through the rest of the loop and you breathe it in again.

How can you convince your teachers not to be upset about cctv cameras installed in their classrooms?

First you need to address that their concerns are legitimate. Do not belittle them for having them or make light of them. Then talk to them about what compromises could be given to meet their concerns.

What is the suffix of photograph?

The suffix -ic (also -ical) means "relating or pertaining to" and forms adjectives from nouns.

Top 6+ Best Waterproof Drones in 2020 - [Buying Guide]?

Some brands known for producing waterproof drones include:

SwellPro: SwellPro specializes in waterproof drones designed specifically for marine environments.

PowerVision: They have released waterproof drones like the PowerEgg X, which is capable of flying in rain and landing on water.

Splash Drone: As the name suggests, Splash Drone focuses on waterproof drones suitable for maritime applications.

QuadH2o: Another brand known for producing rugged, waterproof drones for various purposes.

GDU O2 Plus: This drone has been known for its water-resistant capabilities, though not entirely waterproof.

Parrot Anafi FPV: While not fully waterproof, Parrot Anafi FPV has some water-resistant properties, making it suitable for flying near water bodies in light rain or mist.

How can I get a photograph and specs for the Mombasa buffet by Thomasville furniture Ernest Hemingway Collectiion circa year 2000?

You can try searching online marketplaces, antique furniture stores, or contacting Thomasville Furniture directly to inquire about obtaining a photograph and specifications for the Mombasa buffet from the Ernest Hemingway Collection. You can also look for vintage furniture catalogs or magazines from around the year 2000 that may include information about the piece.

How much did a camera cost back then?

It would depend on the time period and type of camera. In the early 20th century, cameras could range from a few dollars to a few hundred dollars. The cost increased over time with the introduction of new technology and more advanced features, making cameras more expensive.

First halftone photograph published in a newspaper?

The first halftone photograph published in a newspaper was in the New York Daily Graphic on March 4, 1880. It depicted a statue of Diana in the Metropolitan Museum of Art. This breakthrough in printing technology allowed for photographic images to be reproduced in newspapers.

How accurate are thermal imaging cameras?

Depending on how much you're willing to spend on the cameras, they can be pretty beneficial. If you do install thermal imaging cameras, they will be able to pick up heat from bodies. It doesn't matter how dark it is also. Since the cameras work off of heat, there is not getting by these!

What is wide depth of field?

The term "wide depth of field" is not used. Depth of field can either be shallow or deep. The definition of depth of field is this:

Depth of field is defined as the range of object distances within which objects are imaged with acceptable sharpness.

A shallow depth of field would mean that only objects within a small distance in a scene would be focused; everything else would be out-of-focus. For an example, consider many portrait photos; in them the background is blurred while the person is in sharp focus. A deep depth of field would mean that a much larger range of objects at various distances would be in focus. Most landscape photographs are a good example of this.

Is the Sanyo XACTI really waterproof?

The Sanyo XACTI is truly a waterproof video camera. There are videos on YouTube proving the effectiveness of the waterproof feature. It also preforms well for regular photography.

How many schools have surveillance cameras?

Not Many At All .. Perhaps Some In America But I Dont Really Know Any that Have them in Wales :) ?

What is a good description of a camera?

A camera is a sophisticated optical device designed to capture and record visual information in the form of still images or videos. It consists of various components, including a lens system, image sensor, and mechanisms for focusing and exposure control. The lens captures incoming light, which is then directed onto the image sensor. The image sensor converts this light into electrical signals, creating a digital representation of the scene.

Modern cameras often feature advanced technologies such as autofocus for precise focusing, image stabilization for reducing blurriness caused by shaky hands, and various shooting modes to accommodate different lighting conditions and photographic styles. Cameras may be part of standalone devices, such as digital or film cameras, or integrated into smartphones, tablets, and other gadgets.

Additionally, cameras can vary in terms of resolution, sensor size, and other specifications, influencing the quality and clarity of the captured images. Some cameras offer manual controls, allowing photographers to adjust settings like aperture, shutter speed, and ISO to achieve their desired creative effects.

In summary, a camera serves as a tool for visual expression, enabling users to document and interpret the world around them through the art and science of photography.

Where do you find CCTV cameras?

Here are some common places where you might find CCTV cameras:

Official Website and Online Store:

The official website of Brihaspathi Technologies is likely to have information about their CCTV camera offerings, including specifications, pricing, and contact details for inquiries or purchases.

Authorized Dealers and Distributors:

Brihaspathi Technologies may have authorized dealers or distributors who sell their products. These dealers often have physical storefronts or online platforms where customers can purchase CCTV cameras.

Retail Stores and Showrooms:

Some electronic and security equipment stores may carry CCTV cameras, including those offered by Brihaspathi Technologies. These stores may have physical locations where customers can view and purchase products.

E-commerce Platforms:

Online marketplaces like Amazon and other e-commerce websites often feature products from various brands, including Brihaspathi Technologies. Customers can browse and purchase CCTV cameras from these platforms.

For the most current and specific information on where to find CCTV Camera Systems from Brihaspathi Technologies, It is recommended to visit our official website or contacting them directly through our official channels.

What did Daguerre invent?

Louis Daguerre invented a type of photography called the daguerrotype.