What isfocal length of lens

I have tried to find the exact way to calculate the focal length of the lens I need but I have not been able to find a good resource to make this simple enough for my limited optics knowledge. Can you please explain a simple way to calculate the focal length of a lens given the following inputs as an example:

Cameralensdistance calculator

An aspheric lens is usually also a high index lens made for higher prescriptions. It is just a manufacturing process that results in flatter ...

M12 lenses are useful for a wide variety of applications where a rugged, lightweight camera is desirable. Their compact size also makes it easy to integrate ...

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How to calculatefocal lengthPhysics

How to calculatefocal length ofconvexlens

Aspheric lenses are used to minimize optical aberrations within the human eye4. Parts of the eye including the tear film, cornea, and crystalline lens can ...

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Focal lengthformula for concavelens

What you did looks correct, you are using a form of h=f*tan(theta) which is used a lot in optical design. Usually one would use half the vertical sensor size (7.02/2 = 3.51) and half the height of the object(91/2 = 45.5), but in this case it doesn't matter.

Custom made round, square, rectangular, straight Fresnel lens, used for decoration, exhibition hall, research, outdoor......

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How to calculatefocal length ofparabola

Calculatefocal lengthfrom image

I need to purchase my first ever lens. So far I've only used lenses that were built into a camera. This specific lens is for the BlackMagic Deign Pocket Cinema Camera (a video only camera, but one that uses photography lenses). I would prefer this to be a prime lens.

The microscope resolution is determined by the numerical aperture of the objective, which depends on the refractive index of immersion medium used, and the size ...

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I would prefer a simplified mathematical explanation so that I may use it to make similar determinations in the future using a "plug and chug" method.

Mar 4, 2024 — The Modulation Transfer Function (MTF) is a critical parameter in evaluating the performance of optical systems, encompassing lenses and ...

It is important to note that this equation assumes some things, mostly that the axis of the lens is pointed at the person's shoulder area in the "desired result" frame that you gave, though the result holds if you depart from that a little bit.

The objective also has a hemispherical front lens and a meniscus second lens, which work synchronously to assist in capturing light rays at high numerical ...