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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
Why is a pinhole cameras image sharp and dim?
It depends on the size of the hole in the pinhole camera.
If the hole is small, less ray light will flow through the gap. Therefore the image
will naturally be dimmer. Not only that but it is sharper as the hole is smaller, as
well.
R :)
What are the internal parts of a camera?
Digital cameras also have viewing screen to review a photo instantly, and a memory card that stores photos. It also needs a USB cord to attach to a computer to download the photos.
How do you tell if my digital camera battery needs to be replaced?
Fully charge it, then put it in your camera and see how long it lasts. If it doesn't hold a charge as long as it did before, it should be replaced. Lithium ion batteries have a limited number of recharges.
What is the purpose of getting security cameras for your home?
Security cameras are a very good thing to have if you live in or around a bad neighborhood. Even if you do not some get them to make themselves feel safer in their home. If there was ever a time that someone was trying to break in your home and got away then the police would have some proof or evidence.
This is even better I have fake ones look exactly the same as real one no issue on my property, aside from that I keep my light on at night time so everyone could see I have two in front and one if back. I also have a light that goes on automatically in my back yard so if someone is passing by or attempting anything I just have to look out window and away I go I have caught, pursued and reported.
What kind of aperture creates shadow depth of field?
The smaller the aperture, the wider the depth of field.
Additional AnswerDepth of field is also affected by the focal length of the lens. For any given aperture, longer focal lengths (telephoto) have narrower depths of field; shorter focal lengths (wide angle) have wider depths of field.A varifocal lens is a non-fixed focal length lens where the focus changes with focal length. This is in contrast to true zoom lenses, which retain correct focus throughout their focal length range. True zooms have a constant maximum aperture at all focal lengths (as in a 28-70mm f/2.8 lens), while varifocals have maximum apertures that increase (in number, but decrease is size!) as the focal length increases (as in a 28-70mm f/3.5-5.6 lens, which has a maximum aperture of f/3.5 at 28mm, that becomes smaller in size as the focal length increases until it reaches a value of f/5.6 at 70mm).
Varifocals are easier to design and build than true zooms which explains their ubiquity in the camera market. Note that they are commonly, but erroneously, referred to as zoom lenses by users and manufacturers alike.
Where can I purchase a camera to hide in my home?
Security systems today are the most sophisticated ever. Cameras come in all shapes and sizes, and it's not problem to find one that is discreet and well hidden. Check with local law enforcement agencies they can put you in touch with a reputable company in your area.
How can you stop being detected by infrared camera?
it can't c u if u can find a way 2 hide body heat.if that's posibble.the show 'mythbusters' had an episode about it.
What memory card do you use in a canon 7D camera?
Most Canons use SD cards. There could be variations, though, especially if it is an older camera.
Auto Focus on a camera is the camera is focusing on the main object in the photo and blurring out the rest of the background around the object or person, you can turn it off, and its AUTO because it focuses on the object which it thinks is the main object. You can also focus manually.
How does the infrared cameras work?
Infrared is like light with a wavelength beyond the range of human eyes. It can however be picked up by infrared photographic film and digital sensors (digital cameras usually have a filter to block it out though).
When taking infrared photos an infrared filter is needed in front of the lens to block out the visible light.
Do Polaroid cameras need charging?
No. They do require AA batteries, but those are removable. The batteries themselves may be charged (if designed to do so; please read their manual carefully to prevent injury or death).
How can you calculate the focal length of a lens?
A very simple method to calculate the focal length of a lense is to focus it front of the sun and find out a sharp, small point at ground and you have to calculate the distance between that point and lense.... However this gives you approximate result not very accurate resut... For accurate result you have to go in to physics lab and work with optical bench... Thanks
Who invented the first camara and when?
The first camera invented was a device called the camera obscura (Latin for "dark room"), it was a small room with a pinhole in one wall that was used by artists to make paintings of their clients. The earliest extant written record of the camera obscura is in the writings of Mozi (circa 470 BCE-circa 391 BCE), a Han Chinese philosopher, but they had clearly been in use long before that so that the actual inventor and when it was invented cannot be determined.
Are film cameras becoming obsolete?
No, film cameras are not becoming obsolete, nor will they be obsolete anytime soon. A lot of people still use this type of camera for they simply like it better than the digital ones.
Can there be security camera in bathrooms?
yes but it has to be in a place where people can't be seen using urinals or toilet bowls
Why would a photographer use a pinhole camera?
probably to take a picture of something very bright, like the sun.
In reality, the pinhole camera is not the ideal instrument for taking photographs of the sun. It is used instead to create certain specific effects in the photograph. Light passing through the pinhole is not brought to a sharp focus on the image plane in the same way a lens would, so the sharpness of the image is limited, and dependent on the size of the pinhole, the distance of the pinhole from the film plane, and the amount of diffraction from the edges of the pinhole. Even with optimum sharpness, the image will be very soft, with fairly fuzzy outlines. In the hands of a skilled photographer, the effect can be very pleasing.
Where can one purchase a wireless monitor camera?
Arguably the most reputable company to purchase a wireless mini camera from is X-10. X-10 has been a technological leader for many years and has the customer support needed should a problem occur.
What part of the eye is most like an aperture of a camera?
The iris is like the aperture part of a camera, which used to also be called the iris.
How many picture can you store on a 4GB memory card?
The capacity of a card indicates the maximum amount of data that can be stored (less some space for the card's own use).
Megapixel (MP) count refers to the maximum resolution of the camera's sensor -- its ability to record detail. The number of images that can be recorded on a card of a given size is only indirectly related to the capacity of the card, which is measured in Kilobytes (KB) or Megabytes (MB), not MP. That will vary according to the image itself, and to the camera's settings.
For example: My Pentax K10D, with a 10.1 MP sensor and using a 4 GB card, will record approximately 821 images at the highest resolution (10 MP) and a "Fine" setting. The same camera, with the same sensor and same card, will record 10,000-plus images at the lowest resolution (2 MP) and the "Low" setting. Practically all cameras have this ability to change the resolution settings, and thus the sizes of the image files that are stored on the card.
So, you can see that it is only possible to answer your question in very general terms: The higher the capacity of the card, the more images you can store at whatever camera settings. And, as you can see above, even at the highest settings with a high MP count, you can take a lot of pictures!
One thing to think about: storage cards can and do fail. It is better to have two 1 GB cards than one 2 GB card, unless you plan to shoot a whole lot of video. That way if one fails, you can keep shooting and worry about retrieving the images off the other card later.
