Wide Tele Lens

Wide Tele Lens

Depth of Field

The depth of field is an important concept in photography. Provides information about the space around the plane approach, in which objects are sufficiently high sharpness, it is virtually indistinguishable from the main object in establishing the focus.

The depth of field mainly depends on the lens focal length, aperture and distance to the object in focus. The larger the lens focal length, depth of field. Powerful TVs with a focal length of 400-500 mm have a very small depth of field while the 20 to 28 mm wide angle is great. Corelation between openness and depth field is also inversely proportional.

As the opening is smaller (more closed), the depth of field is greater and vice versa. Using a mix of around 22, can provide an enormous depth of field, but not 100% guaranteed clear image, as in openings like diffraction starts to occur and the image becomes softer. The sharpness is usually achieved in 8-11 opening. Finally, the distance to the object is so important – the closer the object is in focus, depth of field and vice versa.

We can not determine whether a good depth of field is small or large. In some cases, small is better, while others – large. So when shooting a close-up portrait, you should use a lens of greater focal length and wide aperture, to get a nice blurred background, without objects that distract the eye irritation. The most appropriate lens for portraits are from 85 to 135 mm. These lenses convey a proper perspective, without typical distortion Wide Angle Lens.

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