201122 — No, the object and image distance can never be the same in a lens. This is because the lens is used to refract light rays and create an image.

Calculatefocal lengthfromFOV

Airy disk (Science: microscopy) The image of a bright point object as focused by a lens system. With monochromatic light, it consists of a central point of maximum intensity surrounded by alternate circles of light and darkness caused by the reinforcement and interference of diffracted rays. The light areas are called maxima and the dark..Read More

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Airy disk (Science: microscopy) The image of a bright point object as focused by a lens system. With monochromatic light, it consists of a central point of maximum intensity surrounded by alternate circles of light and darkness caused by the reinforcement and interference of diffracted rays. The light areas are called maxima and the dark areas minima. The distribution of light from the centre to the outer areas of the figure was investigated mathematically by Sir George airy. The diffraction disk forms a basis for determining the resolving power of an ideal lens system. The diameter of the disk depends largely on the aperture of the lens. The diffraction of light causing the airy disk is a factor limiting the resolution of a well corrected optical system. The bright disk of light (surrounded by alternating dark and bright diffraction rings)that is formed by a perfect diffraction-limited lens, focusing an image of an infinitely small source of light. For a minute absorbing spot, the diffraction pattern is a dark airy disk surrounded by brighter and darker diffraction rings. Since the airy disk is the smallest unit that makes up the image of a luminous or absorbing object (formed by a properly corrected microscope lens in focus), the radius of the disk determines the limit of resolution of the microsc 396 ope.

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Focal length

202378 — A camera sensor is a light-sensitive device that captures the light that enters the camera and converts it into an electronic signal.

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La lunghezza focale, chiamata anche distanza focale, non è altro che la distanza tra il centro ottico di una lente (più o meno il centro geometrico) e il punto ...

Nov 6, 2023 — How To Make LED Lights Brighter · Utilize more LEDs in parallel to amplify brightness · Use pulse-width modulation · Switch to a higher color ...

35mm equivalentfocal length

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Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

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Human Neurology deals essentially with the nervous system of humans. It also features the various theories put forward b..

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But between.... DSLR and interchangeable lens mirrorless cameras and your smartphone, focal length is kinda confusing. I understand why focal length doesn't change between FF and crop sensor cameras because I get that those are describing the actual focal length. And I get that when smartphone manufacturers talk about the zoom range of their cameras, they are probably using focal length as a proxy for field of view. You can just look at a phone and see that that 200mm focal length is not feasible. But what about bridge cameras? What about 1-inch sensor cameras? What does the focal length describe on those cameras?

The wavelength of a sound wave affects how the sound is perceived by the human ear. Longer wavelengths are perceived as lower-pitched sounds, while shorter ...

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I understand why focal length is a stand in for field of view most times. Just having a short hand of the lower the focal length, the wider the shot, and vice versa is intuitive and easy for beginners. But with crop sensors at some point you have to learn how to disambiguate true focal length from field of view (effective focal length).

Whether you're a seasoned professional or just starting out, this subreddit is the perfect place to ask questions, seek advice, and engage in discussions about all things photography. We're here to foster a supportive and knowledgeable community that shares a passion for capturing the world through the lens. If you're new to photography or have a burning question, don't hesitate to make a post! Our community is filled with experienced photographers who are eager to help.