T+Acklin

[|Trastevia]

[|Aperture]

//An __**aperture**__ is a hole,gap, or small opening that casts light, usually on a camara.//

**How the Apture works**. The aperture of the lens controls the amount of light that passes through on its way to the camera's sensor or film plane. The aperture diaphragm sits between the front and rear glass elements of a lens. Manual-focus lenses use internal rings—or cams—that [|rotate in unison]with the outer aperture ring (the one with the f-stop numbers on it), to dilate the aperture blades. **A camera Aperture** A camera's aperture works similarly. It is adjusted automatically by the camera, or manually by the photographer. When aperture blades expand towards the center the lens is being closed—or //'stopped down'//—slowing down the light entering the camera.

When you look at the technical specifications of a digital camera, one of the very first specification mentioned is its [|**maximum aperture**]and/or its **aperture range**.

**A good aperture range is**:  F1.8 - F16 The **maximum aperture** is F1.8, and the **minimum aperture** is F16. //**Depth of Field**// (DOF) is that amount of your shot that will be in focus. **[|Large depth of field]** means that most of your image will be in focus whether it’s close to your camera or far away. [|**Small (or shallow)**]depth of field means that only part of the image will be in focus and the rest will be fuzzy (like in the flower at the top of this post (click to enlarge). You’ll see in it that the tip of the yellow stems are in focus but even though they are only 1cm or so behind them that the petals are out of focus. This is a very shallow depth of field and was taken with an aperture of f/4.5).
 * F1.8 || F2.8 || F4 || F5.6 || F8 || F11 || F16 ||

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