Understanding Exposure by Bryan Peterson

Understanding Exposure by Bryan Peterson is a photography handbook that Amphoto first published in 1990 and has revised several times since.¹ According to the publisher, the fourth edition explains light, aperture and shutter speed, and how they influence one another.²

First, this article sets out what the book is, how its editions differ and what the fourth edition contains. It also looks at what has changed in cameras since 1990. Finally, it lists what we could not verify.

Understanding Exposure by Bryan Peterson at a Glance

Item	What the sources say
Full title	Understanding Exposure: How to Shoot Great Photographs with Any Camera
Author	Bryan Peterson, born 1952 according to the library authority record; photographer, instructor and author
Publisher	Amphoto Books, an imprint of the Crown Publishing Group
Current edition	Fourth edition, published March 15, 2016; ISBN 978-1-60774-850-2
Length	176 pages according to the publisher; 168 pages according to a library catalog record
Topics named by the publisher	Light, aperture, shutter speed, sharpness and contrast, freezing action, meter readings, filters and flash
Library subject heading	Photography > Exposure

First, the publisher presents the fourth edition as a revised version of Peterson’s most popular book. In addition, it describes the book as suitable for photographers of all levels.³

Editions of Understanding Exposure by Bryan Peterson

The book has been reissued many times, so the edition matters when you compare reviews or buy a copy. For that reason, the table below combines publisher pages with catalog data.

Year	Edition	Pages	What the sources say
1990	First edition, Amphoto	144	Catalog record only (Open Library)
1995	Book with CD-ROM, Amphoto	144	Catalog record only (Open Library)
2004	Revised edition, Amphoto Books, dated August 1, 2004	160	Catalog record only (Open Library)
2010	Third edition	176	Publisher: updated for current technologies, more than 100 new images, an all-new chapter, and new material on white balance, flash and HDR
2016	Fourth edition	176 (publisher) or 168 (library)	Publisher: all new images, an expanded flash section, tips on colored gels and advice on star trails

Where the sources for Understanding Exposure by Bryan Peterson disagree

First, the page count of the fourth edition differs: Penguin Random House gives 176 pages, whereas a library record gives 168.⁴ As a result, we cannot explain the difference without holding the book.

Second, the third edition’s description states that the book had sold more than 350,000 copies by 2010.⁵ That figure comes from the publisher, and we found no independent sales data. In addition, the description of Understanding Shutter Speed gives a lower figure of more than 250,000 copies for the same book.⁶ For that reason, we do not repeat larger numbers that circulate online.

What Understanding Exposure by Bryan Peterson Covers

A library catalog lists the contents of the fourth edition in six parts.⁷

• Defining exposure
• Aperture
• Shutter speed
• Light
• Special techniques
• Electronic flash

In other words, the book moves from definitions to the two main camera controls, then to light itself, and ends with special techniques and flash.

What the publisher says Understanding Exposure by Bryan Peterson teaches

In particular, the description of the third edition lists specific lessons. We summarize them here, but we did not check them against the text.⁸

• Which aperture gives the greatest contrast and sharpness, and when to use it.
• Which apertures keep the background an out-of-focus tone.
• Which single aperture, with the right lens, gives sharpness from three feet to infinity.
• How to use shutter speed to freeze action or imply motion.
• Where to take a meter reading for a sunset, snow or a city at dusk.

However, the fourth edition keeps these themes. In addition, it adds, according to the publisher, guidance on filters, flash and light in tricky situations.

Note that the pair above is not from the book. Instead, it shows the kind of difference that aperture choices make, which is the subject of the second chapter.

About Bryan Peterson, the Author of Understanding Exposure

First, Penguin Random House describes Peterson as a professional photographer, an internationally known instructor and a bestselling author. It also names his other titles: Understanding Shutter Speed, Learning to See Creatively, Understanding Digital Photography and Beyond Portraiture. In addition, it says he founded the online Perfect Picture School of Photography and lives in Chicago.⁹

However, we found no independent biography. As a result, this article does not describe his career beyond what the publisher states.

Understanding Exposure by Bryan Peterson in 2026

Note that the material in this section is not from the book. Even so, it explains why a handbook from 1990 can still be useful, and where cameras have moved on.

Why ISO matters alongside the book’s controls

The publisher’s descriptions name light, aperture and shutter speed. In contrast, they do not mention ISO. Digital cameras, however, also let you set sensitivity. The international standard ISO 12232:2019 covers the determination of exposure index, ISO speed ratings, standard output sensitivity and recommended exposure index for digital still cameras.¹⁰ In practice, raising sensitivity lets you use a faster shutter speed or a smaller aperture in dim light, but noise becomes more visible.

Smartphones and very low light

Meanwhile, phone cameras now solve some exposure problems in software. For example, Liba and colleagues describe a handheld smartphone system for very low light.¹¹ Because such systems process several frames automatically, manual exposure choices matter less in some situations. Even so, we did not test how the book’s advice applies to phones, so we make no claim about it.

For related practical guides on this blog, see our landscape photography settings guide and our article on night photography on vacation.

Frequently Asked Questions

Which edition of Understanding Exposure by Bryan Peterson is current?

The fourth edition, published March 15, 2016, is the one Penguin Random House lists as a paperback. However, earlier editions exist, and we did not compare their texts.

Is Understanding Exposure by Bryan Peterson for beginners?

The publisher says the revised edition is meant for photographers of all levels. That is a marketing statement, so reading the sample pages is the safer test.

Does Understanding Exposure by Bryan Peterson cover flash?

Yes, because the fourth edition ends with a chapter on electronic flash, and the publisher says the flash section was expanded and now includes colored gels.

Does the book cover digital cameras?

For example, the third edition was described as updated for current technologies, with new material on white balance and HDR. In addition, the fourth edition’s subtitle promises advice for any camera.

Further Reading

• Penguin Random House, Understanding Exposure, Fourth Edition.
• Penguin Random House, Understanding Exposure, 3rd Edition.
• Schlow Centre Region Library, catalog record for the fourth edition.
• Open Library, Understanding Exposure, list of editions.
• ISO 12232:2019, exposure index and ISO speed ratings.
• Liba et al., “Handheld mobile photography in very low light” (2019).

Sources and Limits for Understanding Exposure by Bryan Peterson

Sources used

First, facts about the 2010 and 2016 editions and about the author come from Penguin Random House. Second, the contents list, the 168-page count and the birth year come from a library catalog record. In addition, the 1990, 1995 and 2004 details come from Open Library, a secondary source. Finally, the standard and the research paper were checked on the ISO page and in Crossref.

Limits of what we could verify

First, we did not read the book, so we cannot judge its explanations, photographs or accuracy. Second, the 1990, 1995 and 2004 editions are known only from catalog data. Third, the sales figure and the phrases “for all levels” and “most popular” are the publisher’s claims. In addition, we do not repeat the “exposure triangle” framing or higher sales numbers found elsewhere, because we could not trace them to the book. Furthermore, the ISO standard and the smartphone paper are not part of the book, and we read only the standard’s catalog page and the paper’s abstract. Finally, the three images come from Wikimedia Commons, not from the book.

1. The earliest edition (Amphoto, 1990, 144 pages) appears in the Open Library record for the work. Therefore, this is catalog data, not a copy of the book.
2. Description of the fourth edition: Penguin Random House, Understanding Exposure, Fourth Edition.
3. However, both statements are the publisher’s own wording, from the Penguin Random House page. We treat them as marketing claims, not as findings.
4. Publisher: Penguin Random House. Library record: Schlow Centre Region Library catalog, MARC view. Open Library also lists 168 pages for the 2016 edition.
5. Description of the third edition: Penguin Random House, Understanding Exposure, 3rd Edition, ebook published December 21, 2010.
6. Penguin Random House, Understanding Shutter Speed. We could not tell which page was written later. Our separate article on the Bryan Peterson exposure books compares the whole series.
7. Contents note (MARC field 505): Schlow Centre Region Library catalog.
8. Source for the list: Penguin Random House, third edition page.
9. Author biography: Penguin Random House, fourth edition page. Birth year (1952): the authority heading “Peterson, Bryan, 1952-” in the library record.
10. Title and scope: ISO 12232:2019, Photography — Digital still cameras. We read the catalog page, not the standard itself.
11. Orly Liba et al., “Handheld mobile photography in very low light,” ACM Transactions on Graphics, 2019, doi:10.1145/3355089.3356508. DOI verified in Crossref; we read the abstract only.