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Product Review: ExpoAperture2: Depth Of Field Guide from ExpoImaging

from BC Blogcritics Magazine, 8/9/2008

If you want to have better control of your depth of field, if you want to have a tool small enough to fit in your shirt pocket, if you just want to get it right, then you need ExpoAperture. At $39.95 USD, the ExpoAperture is incredibly affordable, and is usually available for much less if you shop around. I highly recommend the ExpoAperture.

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Master depth-of-field with the ExpoAperture2 Depth-of-Field Guide.
For more examples of images demonstrating control over Depth-of-Field, please visit our Depth-of-Field Gallery.

More Photos:  1  2  3  4  5  6

ExpoAperture2 Depth-of-Field Guide

The ExpoAperture2 Depth-of-Field Guide has been discontinued and is only available as a METRIC 2 Disc Kit in limited quantities.  We also have the Imperial EDUCATOR dial available.

What is the ExpoAperture2 Depth of Field Guide?

The ExpoAperture2 Depth of Field Guide is a versatile and unique tool which instantly shows you the relationships between focal length, focus distance, aperture and resulting depth-of-field.  The ExpoAperture2 Guide empowers photographers to take control over depth-of-field and to apply selective focus easily and effectively in their photography.

A photographer using the ExpoAperture2 Depth-of-Field Guide simply selects the camera’s sensor or film size and desired focal length for a given shot.  The Guide quickly provides the resulting depth-of-field for a given aperture, or, alternatively, determines the aperture necessary to achieve a desired depth-of-field.  The Guide also easily calculates hyperfocal distances.  The Guide is designed so that beginning and experienced photographers alike can quickly compare the relative variables (aperture, lens focal length and subject distance) to determine which combination works best for their chosen shot.  In this way, the Guide enables photographers to exercise better creative control over their cameras and images. 

As a tool for everyday use, the ExpoAperture2 Depth-of-Field Guide can easily fit into a shirt pocket or camera bag for convenient access when needed.  The Depth-of-Field Guide is printed front and back on three durable, circular plastic discs that rotate against one another, effectively functioning as a compact mechanical calculator.

What is Depth of Field?

As a concept, depth-of-field is poorly understood by many beginning and amateur photographers. One of the primary benefits of owning a DSLR camera is the control the photographer gains over the relative depth-of-field (what appears to be in sharpest focus) for any given shot.  In contrast, digital point and shoot cameras utilize sensors so small, with correspondingly short focal length lenses, that there is very little opportunity to exercise any depth of field control because literally everything appears to be in sharp focus.

Even for those more experienced photographers who do understand the relationships between aperture size, lens focal length and subject distance, calculating the best aperture to achieve a desired result often amounts to little more than guesswork, and frequently results in overcompensation and wasted shutter speed.

Teaching depth of field with the ExpoAperture2.

Teaching depth-of-field concepts has traditionally been one of the most difficult jobs for photographic educators.  The ExpoAperture2 Depth-of-Field Guide makes educators' jobs easier by offering beginning photographers a hands-on, visual learning experience that can be used to provide real solutions to common photographic dilemmas.  The Guide represents a unique teaching tool that can demonstrate depth-of-field relationships in an intuitive, visual way easily grasped by students.

The ExpoAperture2 Depth-of-Field Guide has been discontinued and is only available as a METRIC 2 Disc Kit in limited quantities.  We also have the Imperial EDUCATOR dial available.

The METRIC ExpoAperture2 Depth-of-Field Guide 2 Disc Kit includes the Standard Dial (covers 10 to 135mm focal lengths and distances from 31cm to infinity) and the Telephoto Dial (covers 70 to 600mm focal lengths and distances from 4.6 meters to infinity).  You should only purchase this product if you are comfortable gauging distances in the metric scale.  This dial was devoloped for our international customers.

The IMPERIAL ExpoAperture2 Depth-of-Field Guide is out of stock and discontinued.

The ExpoAperture2 Depth-of-Field Guide is available in a large (21.25 in. diameter) version for educational use.  This is the Standard IMPERIAL dial that covers 15 to 135mm focal lengths and distances from 12 inches to infinity.

The ExpoAperture2 Depth-of-Field Guide includes a printed Quick Start Guide, a storage pouch, and a sensor format reference chart.

The Full Instruction Manual can be found under the ExpoAperture2 Support


- Assert better creative control over depth-of-field
- Compensates for a wide variety of sensor formats and film sizes
- Develops an intuitive understanding of depth-of-field relationships with continued use
- Includes printed QuickStart Guide, storage pouch, and sensor format reference chart
- Fast and easy to use