While 4K is generally considered superior to 5MP in terms of video or image quality, factors such as color accuracy, dynamic range, contrast, and overall image processing also play crucial roles.

FOV tofocal length

With a resolution of 2,560 x 1,920 pixels per unit, 5MP cameras are a popular choice for surveillance, ensuring clear and detailed images.

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Lens formula

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For a thin double convex lens, refraction acts to focus all parallel rays to a point referred to as the principal focal point. The distance from the lens to that point is the principal focal length f of the lens. For a double concave lens where the rays are diverged, the principal focal length is the distance at which the back-projected rays would come together and it is given a negative sign. The lens strength in diopters is defined as the inverse of the focal length in meters. For a thick lens made from spherical surfaces, the focal distance will differ for different rays, and this change is called spherical aberration. The focal length for different wavelengths will also differ slightly, and this is called chromatic aberration.

This shows parallel beams from two helium-neon lasers converging to the principal focal point of a 30 cm double convex lens. The rays then enter a diverging lens of focal length -10cm on the right. The laser beams were made visible with a spray can of artificial smoke.

Focal length

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Focal length ofmirrorformula

The most important characteristic of a lens is its principal focal length, or its inverse which is called the lens strength or lens "power". Optometrists usually prescribe corrective lenses in terms of the lens power in diopters. The lens power is the inverse of the focal length in meters: the physical unit for lens power is 1/meter which is called diopter.

5MP security cameras offer superior clarity compared to low megapixel cameras, thanks to their enhanced resolution. For instance, a 5MP IP camera is at least twice as clear as a 2MP (1080p) camera.

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Focal length formula

The principal focal length of a lens is determined by the index of refraction of the glass, the radii of curvature of the surfaces, and the medium in which the lens resides. It can be calculated from the lens-maker's formula for thin lenses.

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Lensequation

5MP denotes a camera resolution of around 5 megapixels, delivering more detail and higher resolution than 1080p, which represents a video resolution of 1920 pixels × 1080 pixels. While 1080P is a standard high-definition (HD) resolution, 5MP provides a higher pixel count and superior image quality.

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2011119 — Using a confocal microscope, the light illuminating the specimen is focused by the objective, and collected by a darkfield condenser.