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A camera lens may have a shield called a "lens hood" encircling it to prevent strong light entering from the side. Although such side light would not be focused with the image, it could reflect off the internal surfaces of the lenses to cause a "flare" of light within the image. This problem is more critical in lenses with many elements and lenses of long focal length, so we most often see lens hoods on telephoto lenses.
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Who took the picture of the first man to walk on the moon?
The camera was installed by Grumman when the Lunar Module was assembled. The camera was installed a fold-out panel called the MESA, which was to the left of the ladder. When Neil Armstrong stepped of the LM's porch onto the ladder he pulled a D-handle, unfolding the MESA, which activated the camera.
What was the left side of the titanic called?
Most boats' left side (when facing forward) is called the port side.
How do you say left in Punjabi?
Khabba And right (side) is called sajja
What are similarities between a pinhole camera and a digital camera?
The only similarity between them is that both are capable of taking a recognizable picture.
Who filmed n Armstrong stepping onto the moon?
The Lunar Module did! While still on the steps, Armstrong deployed the Modularized Equipment Stowage Assembly from the side of the lunar module.This housed, amongst other things, the TV camera. This meant that upward of 600 million people on earth could take part in this historic moment.
Why is convex lens called converging lens?
All of the light entering the lens converges on the other side to a single point, the lens' focal point.
What is the difference between a pinhole camera and a slr camera?
Most photographers would consider an slr to be "normal". If it's not an slr or a tlr, then you must be referring to a range finder camera or monorail camera. I presume range finder. Thus the major difference is that an slr system presents to the viewing eye pretty much everything that the lens is bringing to the film (minus the parts where the circular image lies outside the film rectangle). A range finder attempts to do this with a separate small viewing lens usually mounted on the camera face off to one side of the lens. The angle of view of the main lens is not the same as the angle of view of the viewing lens, which is usually not a problem. But if you are close enough to a subject such as a flower and you place the camera according to what you see in the viewfinder, you will be too far off to one side and will get less than the whole flower in the picture. This effect is known as parallax.
Where is the focal point in a convex lens?
If you shine a parallel (ie unfocussed) beam of light perpendicular to a convex lens it will focus to a point on the other side. That place is called the focal point of the lens. Its distance to the lens is called the focal length.
What VR stand for camera lens?
"VR" is a Nikon thing. It means "vibration reduction." It's got two parts to it. In the camera body, there are two angular velocity sensors. One of them detects up-and-down shaking, the other detects side-to-side shaking. In the lens there is one glass element that's got two motors attached to it. They move the element to compensate for your shaking. The result is you can shoot at shutter speeds far slower than you could without it. The VR lens only works as part of a system, so if you buy a VR lens and put it on a non-VR camera it won't do you any good.
How do you focus your Nikon D5000 camera when filming?
If you have an AF, or auto-focus lens (like the kit 18-55mm lens) you can focus your lens prior to filming, but cannot auto-focus while filming. To manually focus, switch the switch on the side of your lens to 'M' for manual. To focus, turn the outer focus ring on the lens until your subject matter is clear.
What to use to take picture of coins?
Try a digital camera with its lens set to "closeup". You may need to provide some side lighting rather than using a flash, because it will help the coin's features to show up better. For small coins you'll probably need a special lens, however. I'd discuss that with a local camera dealer for ideas specific to whatever camera you own.
How is the image formed on the film of a camera?
In a camera, the light from the subject is refracted by the camera lens, and focused on the film or digital receptor inside the camera. The lens is taking the "large image" and shrinking it to a smaller size, and this small image becomes the digital image (or the negative image on film).How a Camera WorksA camera is any sort of light tight chamber (the word camera means "chamber" in Latin) with a pinhole or convex lens in one side. The lens is what "forms" the image on the opposite side of the camera. Your eyes are cameras! They are light-tight chambers with convex lenses which form continuous images on the retinas (light sensitive surfaces) at the backs of your eyeballs. Because of the way light passes through a pinhole or lens, the image is projected to the back of any camera upside down. This is just as true in your eye as it is in your camera! But, you protest, I don't see upside down! No, you don't, because your brain "flips" the image right side up as it comes from your optic nerve. Your digital camera does the same thing electronically before it delivers the image to your viewscreen.Sight, and your camera, works because objects reflect light. Even black objects reflect some light. Lighter colors reflect more. The pinhole or lens in any camera is gathering light as it comes reflected from a scene. The light reflected from the scene is scattering in all directions, but as light from what you see reaches the pinhole or convex lens in your camera or eye, you can try imagining that the light rays from the scene must bendand squash down (we say converge) in order to pass through the pinhole or lens. Inside, the light rays must cross, which is why the image projected to the back is upside down. If the lens is the correct distance (focused) from the back of the camera, the lens will form a sharp image on the side opposite the lens, which can be your retina, film in a film camera, or the sensor in a digital camera.There's lots more to know. See the Related Question, and be sure to check out the Related Link below. It has a fun, easy project for any age for making a pinhole camera that you can look inside and actually see the upside down image projected onto a translucent screen made of waxed paper.
What are the differences between convex lens and biconvex lens?
A convex lens has one flat side and one curved side --> |) A biconvex lens has both sides curved --> ()
A neat line of things side by side?
A neat line of things side by side is called a stack or row.
A convex lens is also called a lens?
converging lens
What is converging lens?
A converging lens is thin at the ends and thick in the middle. It is called converging because the rays of light passing through it, if parallel, converge at a point the other side. A magnifying glass uses a converging lens.
What is a converging lens?
A converging lens is thin at the ends and thick in the middle. It is called converging because the rays of light passing through it, if parallel, converge at a point the other side. A magnifying glass uses a converging lens.
