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A Simple Explanation On How Aperture Impacts Depth Of Field (And Why Pinholes Are Always Sharp)

Nov 13, 2014 by Udi Tirosh 5 Comments

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lenses-pinholes

There is a Seinfeld episode where George loses his glasses, yet he is able to spot a coin on the floor by squinting. Without knowing the team at Seinfeld made a very elegant scientific experiment comparing lenses to pin holes.

A Lens makes things sharp by focusing rays of light coming from a source so the rays converge on a single sport.

A pinhole, on the other hand, only allows light to enter from a single direction thus not letting it blur.

Both aspects are very clearly explained in this video by MinutePhysics.

Indecently, this video also explains how aperture works and why the Bokeh Masters Kit makes star shaped bokeh.

So why most applications prefer a lens over a pinhole (which is obliviously cheaper to manufacture?) Because pinholes work by blocking light the resulting image is significantly darker.

[How to See Without Glasses via reddit]

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Related posts:

Depth of Field: the ultimate beginner’s guide to controlling depth of field using lens aperture in nature photography How to simulate large aperture depth of field outdoors in Photoshop with depth maps Understanding Full-Frame vs Crop-Sensor Impacts on Depth-Of-Field And Perspective A simple technique for faking subtle shallow depth of field in Photoshop

Filed Under: Tutorials Tagged With: aperture, Lenses, pinhole camera

Udi Tirosh: from diyphotography.net

About Udi Tirosh

Udi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.

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Udi Tirosh: from diyphotography.netUdi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.

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