About Aperture

When it comes to photography, there are three main subjects that you must know.  These are ISO, shutter speed, and aperture.  These three combined create what we call exposure.  We will focus on aperture, since that’s what Wamsoon’s aperture project was about.

When you purchase a lens, it will have f sign on it, which translates to “f-stop”.  f-stop is a way to describe how big the aperture is.  Smaller the f-stop, larger the aperture while larger the f-stop, smaller the aperture.  Here’s a picture from wiki you can use (image courtesy of Wikipedia) to understand the concept better.

Aperture is basically just a hole within a lens which lets light travel into the camera body.  Below is a project I made by adjusting only the aperture on the canon f1.8 50mm lens.  White balance was 3900k, shutter was 50.04, 216 degrees, and ISO 800.

It’s obvious that the amount of light dissipates as aperture gets lower, but the background images start to become clearer/sharper.  The depth of field changes as aperture changes as well, low aperture brings background and foreground together.

For nature photographers who want to get a overall sharp picture, a low aperture lens should be used, while photographers who wants to focus on an object and blur out the rest uses high aperture lenses.  However, lenses these days come with minimum aperture that you can toggle between the aperture, so many focuses on the maximum number (1.4 or lower).

High aperture lenses are usually used in low light setting while low aperture is used in landscape setting during day time when there’s lot of natural lights to get a noticeable details.

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