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What else can I help you with?
What does a 58mm lens mean?
A 58mm lens refers to the diameter of the lens barrel at the front of the lens. This measurement is important for selecting compatible lens filters and accessories. It does not directly relate to the focal length or zoom capability of the lens.
How can you find focal length of a converging lens?
To find the approximate value of the focal length of a convex lens, let us do an experiment. Place a convex some distance away from a light source. At the opposite side of the lens, place a white paper. Now adjust the position of the lens till a sharp point of light on the white paper is obtained. Measure the distance between the lens and the white paper. This gives the value of the focal leng
Which lens concave or convex forms the image wider?
Only a convex lens forms any kind of real image and the size of the image is dependent upon the focal length (hence the curvature and and substance) of the lens. A concave lens forms a virtual or imaginary image in front of the lens. It is one that cannot be projected onto a surface. Perhaps what you mean has to do with convergence and divergence. A convex lens causes light rays to converge (come together at a point), while a concave lens causes rays to diverge.
What happens when incident rays of a convex lens converge?
You mean the entering rays into the convex lens is already in convergence mode. Ok. Now as it enters into the convex lens convergence would be increased as convex lens would do only converging phenomenon.
Why is the focal length of a plane mirror infinity?
In a plane mirror, the radius of curvature is infinitly long, so the focus will be at infinity. Another way to say it is that a plane mirror has no curvature, and as curvature becomes increasingly small, focal length becomes increasingly long. At a curvature of zero, focal length becomes infinite. Focal length(f) is given by f=R/2 where R is radius of curvature.. Once again, it's infinity! See answer to your question on radius of curvature. Plug infinity (radius of curvature) into your mirror equation to get the focal length, which will also be infinite. A flat mirror does not focus incoming parallel beams. That's because if you say its at infinity it means it does exist in a finite distance, that is instead of saying it does exist its taken at infinite distance for only theoretical importance and not for practical observance. Focal length is half of radius of curvature of the mirror. So bigger the circle gets the more its radius will be. So in the same way as the curvature of the sphere gets less and less its focal length increases, so when it becomes totally flat the focal length will become infinite so it means it has no existence but it has only theoretical importance. It same as taking the formation of image of an object at principal focus to be at infinite distance rather than saying it does not form ( that is both mean the same). hope my answer is satisfactory
What is the Local length of the lens?
i think you mean FOCAL LENGTH.
What do the numbers followed by mm mean on a jewlers loupe?
The focal length of the lens in the loupe
What does the "mm" in a camera lens mean?
The "mm" in a camera lens refers to the focal length of the lens, which determines the angle of view and magnification of the image.
What does 'par focal' mean?
A parfocal lens is a lens that stays in focus when magnification/focal length is changed. There is inevitably some amount of focus error, but small enough to be considered insignificant.
What does mm mean for a digital camera?
MM refers to the focal length of the lens. In the old, old days of Paul Rudolph's original Tessar lens, "focal length" meant the distance between the middle of the lens and the "focal point" - the point at which all the rays of light coming out of the lens converge on one spot. That lens was first introduced in 1902, and since then we've learned that different focal lengths of lenses have different angles of view...so now, if a lens has an angle of view equal to that of a 50mm lens, we call the lens a "50mm" regardless of the actual length of the lens.
What does the "f" mean in lenses and how does it affect the performance of the lens?
The "f" in lenses stands for focal length. It is a measure of how strongly a lens converges or diverges light. The focal length affects the magnification and field of view of the lens, as well as its ability to focus light onto the image sensor or film plane. A shorter focal length results in a wider field of view and greater magnification, while a longer focal length provides a narrower field of view and less magnification.
What does a 58mm lens mean?
A 58mm lens refers to the diameter of the lens barrel at the front of the lens. This measurement is important for selecting compatible lens filters and accessories. It does not directly relate to the focal length or zoom capability of the lens.
What does mean the mm e.g. 18 -200 mm camera or 55-200 mm?
That number is the focal length of the camera's lens ... which focuses light from the scene to form an image on the 'film' or CCD inside the camera. The longer the focal length of the lens, the larger (nearer) the objects appear to be in the picture. (One radian of angle as seen by the lens ===> One focal length on the film.) On the cameras described in the question, the focal length is given as a range ... "from 18 to 200 mm", and "from 55 to 200 mm". Each of these is a "zoom" lens, whose focal length can be changed over the range, enabling the user to cause objects in the picture to appear somewhat nearer or farther away.
What does the "mm" mean on a lens and how does it affect the photography?
The "mm" on a lens stands for millimeters, which refers to the focal length of the lens. A higher mm number indicates a longer focal length, resulting in a narrower field of view and magnified image. This affects photography by determining how much of the scene can be captured in the frame and the level of magnification of the subject.
What does 75 -300 mm mean in relation to camera lenses?
This is a Zoom lens with a focal length of between 75 and 300 mm.
What does parfocalization mean?
A parfocal lens is actually a lens that stays in focus when there is change in the magnification, or focal, length. The amount of focus error is so small in fact, its considered insignificant.
What does a higher mm lens mean in terms of camera photography?
A higher mm lens in camera photography means that the lens has a longer focal length, which allows you to zoom in closer to distant subjects and capture more detail.
