Understanding Lens Separation for Creating an Image at Infinity

Thread starter Thrax
Start date Aug 11, 2010
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Image Infinity Lens Separation

In summary, lens separation refers to the distance between the front and back lens elements of a camera lens, which directly affects the focal length and ability to create images at infinity. Understanding lens separation is important for achieving sharp focus on distant objects, and it can be determined by consulting lens specifications or physically measuring the distance. In some cases, lens separation can be adjusted to improve focus at infinity, but this may also impact other aspects of the lens.

Aug 11, 2010

Thrax

Homework Statement

The lenses are separated by 250mm. Where should the object be places so that the final image is formed at infinity?
I'm confused.

Last edited: Aug 11, 2010

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Aug 11, 2010

zhermes

We need more information, an attempt at a solution, and an explanation of what you're confused about.

Related to Understanding Lens Separation for Creating an Image at Infinity

1. What is lens separation?

Lens separation refers to the distance between the front and back lens elements of a camera lens. This distance affects the focal length of the lens, and therefore, the ability to create an image at infinity.

2. How does lens separation affect infinity focus?

The lens separation directly impacts the focal length of the lens. A longer lens separation results in a longer focal length, which allows for better focus at infinity. On the other hand, a shorter lens separation may result in a shorter focal length and difficulty achieving focus at infinity.

3. Why is understanding lens separation important for creating images at infinity?

Understanding lens separation is crucial for photographers and scientists who need to capture images at infinite distances. Without proper lens separation, it may be challenging to achieve sharp focus on distant objects, resulting in blurry or out-of-focus images.

4. How can I determine the lens separation of a camera lens?

The lens separation of a camera lens can vary depending on the make and model. One way to determine the lens separation is by consulting the lens specifications provided by the manufacturer. Another way is to physically measure the distance between the front and back lens elements using a ruler or caliper.

5. Can lens separation be adjusted to improve focus at infinity?

In some cases, yes, lens separation can be adjusted to improve focus at infinity. This can be done by physically changing the distance between the lens elements or by using a lens with a longer focal length. However, it is important to note that altering the lens separation may also affect other aspects of the lens, such as the minimum focusing distance and overall image quality.