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How can one determine the focal length of a lens?
The focal length of a lens can be determined by measuring the distance between the lens and the point where light rays converge to form a sharp image. This distance is the focal length of the lens.
How would you measure the focal length of a converging lens?
One common method is to use the lens formula: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. By measuring these distances and plugging them into the formula, you can calculate the focal length of the lens. Alternatively, you can use a lens positioning system to determine the position of the focused image, which can also help you find the focal length.
What is the lens maker's formula and how is it used to calculate the focal length of a lens?
The lens maker's formula is a mathematical equation used to calculate the focal length of a lens based on its refractive index and the radii of curvature of its surfaces. It is expressed as: 1/f (n - 1) (1/R1 - 1/R2) Where: f focal length of the lens n refractive index of the lens material R1 radius of curvature of the first lens surface R2 radius of curvature of the second lens surface By plugging in the values for n, R1, and R2 into the formula, one can determine the focal length of the lens.
Did Weegee the photographer use more than one focual length on his lens setting?
Yes, Weegee the photographer primarily used a single focal length lens, which was typically a 35mm lens on his camera. This focal length allowed him to capture the scene quickly and effectively, which was crucial for his style of street and crime photography.
What do you mean by an equivalent lens and equivalent focal length?
An equivalent lens refers to a lens used on a different format camera that produces a similar field of view as a given lens on a specific format camera. Equivalent focal length is the focal length of the equivalent lens on the different format camera that provides a similar angle of view as the original lens on the specific format camera.
How can one determine the focal length of a lens?
The focal length of a lens can be determined by measuring the distance between the lens and the point where light rays converge to form a sharp image. This distance is the focal length of the lens.
What is the distance from a lens to one of its foci called?
The distance from the center of a lens to one of its focal points is the focal length of the lens.
What is the difference between a zoom lens and a fixed lens?
A zoom lens you can go from one focal length to another such as 70-200mm and a fixed is one focal length such as 50mm
What is the magnifing power of the lens?
Depends on your microscope. We've got one that's a x2.
If a convex lens of focal length f splits into two equal parts what will be the new focal length?
there can be two ways to cut a convex lens into two equal parts-- one, along the principal axis and another, perpendicular to the principal axis. If the lens is cut along the principal axis, then there will bo NO change in the focal length of the lens. But, if it is cut perpendicular to the principal axis, then the focal length will be twice the original one.
You can take long distance photographs with what lens?
The one with the largest available focal length.
How would you measure the focal length of a converging lens?
One common method is to use the lens formula: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. By measuring these distances and plugging them into the formula, you can calculate the focal length of the lens. Alternatively, you can use a lens positioning system to determine the position of the focused image, which can also help you find the focal length.
What is the lens maker's formula and how is it used to calculate the focal length of a lens?
The lens maker's formula is a mathematical equation used to calculate the focal length of a lens based on its refractive index and the radii of curvature of its surfaces. It is expressed as: 1/f (n - 1) (1/R1 - 1/R2) Where: f focal length of the lens n refractive index of the lens material R1 radius of curvature of the first lens surface R2 radius of curvature of the second lens surface By plugging in the values for n, R1, and R2 into the formula, one can determine the focal length of the lens.
Which lens would be called a prime lens?
A Prime lens is one that a fixed focal length. An example would be a 35mm lens. Prime lenses tend to have higher aperture capabilities at a lower cost. They also tend to focus faster because the focal length never changes.
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.
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.
Did Weegee the photographer use more than one focual length on his lens setting?
Yes, Weegee the photographer primarily used a single focal length lens, which was typically a 35mm lens on his camera. This focal length allowed him to capture the scene quickly and effectively, which was crucial for his style of street and crime photography.
