Ambient Light Photography

Also known as: Available light photography, natural light photography, filter photography
Category: Photography technique
Related techniques: Wide-angle photography, Split/over-under photography, Close-focus wide-angle

Overview

Ambient light photography is the practice of shooting underwater using only the available sunlight (or, in some cases, continuous video lights) rather than strobes. It encompasses a broad range of approaches: unfiltered silhouettes and sunbursts, color-corrected imagery using optical filters combined with custom white balance, and hybrid techniques that blend filtered ambient light with strobe-lit foregrounds using complementary filter pairs. The technique is especially effective in shallow, clear water where sufficient natural light penetrates to illuminate subjects and restore color.

The approach has deep roots in underwater videography, where filters and manual white balance have long been standard practice. With the advent of digital still cameras offering adjustable white balance, ambient light photography became viable for still shooters as well. As Craig Jones explained in his foundational 2003 Wetpixel feature: “Although long practiced in digital video, ambient-light photography is still fairly new to underwater still shooters” (^[1]).

The defining advantage of ambient light photography is even illumination across the entire frame. Strobes can only light subjects within a few meters of the camera, creating foregrounds lit in full color against monochromatic blue or green backgrounds. As Massimo Franzese noted in his 2019 review of Keldan filters: “The key benefit of filters is that they correct the colors throughout the whole frame, so you do not have the issue of footage and images having colorful subjects in the foreground and dim blue backgrounds” (^[2]).

Kurt Amsler, reflecting on decades of professional experience, articulated the philosophical case for ambient light mastery in a 2010 interview with Alex Mustard: “Nowadays the photographers have one or two strobes and they are in love with them! … They don’t think about other light sources anymore. And that reflects in their pictures. They don’t care about the sun, they don’t know these days if the sun is behind you the water is more blue, if it is in front of you, everything is more diffuse. They just rely on their strobe. And the key to underwater photography is mixing light, ambient and strobe. Mixing it the way you want. This is art” (^[3]).

The Physics of Light Underwater

Understanding how water affects light is essential to ambient light photography. Craig Jones’s 2003 article “Filters and Ambient Light Photography” provided a detailed technical explanation that became a key reference for the Wetpixel community (^[4]).

Water acts as a selective filter of visible light with two main effects:

1. Color temperature shift: Water selectively absorbs warm colors (reds, oranges, yellows) while allowing blues and greens to pass. This shifts the light toward higher color temperatures. The effect intensifies with depth and with the distance between subject and camera (^[5]).

2. Bandpass filtering: Water acts as a bandpass filter centered on cyan. In turbid or green water, the center of the band shifts toward green or yellow, explaining the characteristic green appearance of murky water (^[6]).

The total “water path” affecting color is the sum of the depth of the subject plus the distance from subject to lens. Water quality (dissolved and suspended matter), time of day, and cloud cover also significantly affect the available spectrum (^[7]).

A critical limitation is that once red wavelengths are lost at sufficient depth, no amount of filtration can restore them. As Jones noted: “Once at sufficient depth, no amount of filtration can effectively restore lost reds. For this there is no substitute for artificial light.” The practical depth limit for effective ambient light filter photography is approximately 15-20 meters in clear tropical water (^[8], ^[9]).

History

Video Origins

Ambient light photography underwater has its origins in videography, where filters and adjustable white balance were standard tools long before digital still cameras existed. Underwater video lights were expensive, power-hungry, and limited in coverage, so videographers relied on color-correcting filters to restore natural color from ambient light. As Alex Mustard wrote in his 2005 review of the UR Pro shallow water filter: “Of course, underwater filter photography is not new. I know photographers who were using filters underwater back in the 60s” (^[10]).

The problem for film still photographers was that filters could never exactly counterbalance the variable filtering effect of seawater, and the colors recorded on film “were never quite right, and ultimately disappointing. Strobes seemed a much better solution for colourful underwater images.” The game changed with digital cameras: “Filters worked perfectly for [videographers] because their cameras had adjustable white balance, which could be used to fine tune colours and produce excellent results. This fine-tuning is now available to the still photographer because digital cameras also have adjustable white balance” (^[11]).

The Craig Jones Foundation (2003)

The modern era of ambient light still photography was catalyzed by Craig Jones, a Wetpixel contributor and digital video veteran, who published two landmark articles in 2003. “Filters and Ambient Light Photography” (June 2003) provided the technical framework explaining how water filters light and how photographers could use color compensating (CC) filters, color conversion filters, and fluorescent-correction filters to restore natural color. The article included detailed filter characterization tables comparing UR Pro, Tiffen, Hoya, B+W, Singh-Ray, HiTech, and Lee filters for underwater use (^[12]).

Jones’s recommendations were practical: “A good starting point is to purchase two strengths of magenta (say, 30 and 50 or 20 and 40), and then add two strengths of warming (81EF and 85). For shallow shots use the weak pair. For deep the strong pair. For green water use the strong magenta with or without the 81EF” (^[13]).

His companion article “Feature: Ambient Light Photography” (July 2003) covered the practical technique of using filters with custom white balance, illustrated with photos by Alex Mustard shot with a Nikon D100 and 16mm lens, using a red filter and custom white balance from a grey card (^[14]).

Also in 2003, Jones published a tutorial on silhouette color correction for video, demonstrating how to correct wide-angle silhouette footage using RGB adjustment and hue controls to transform green water into pleasing blue (^[15]).

UR Pro Filters (2005)

UR Pro’s color correction filters, long favorites of videographers, became important tools for digital still photographers. Underwater videography legend Stan Waterman endorsed them: “URPRO filters provided dependable color balance to an otherwise monochromatic blue world… I depend on them” (^[16]).

In 2005, UR Pro released the SW-CY (Shallow Water CY) filter, designed for the 0-8 meter depth range where still photographers found the most pleasing filtered results. Alex Mustard reviewed it for Wetpixel, testing it on both an Olympus 5060 compact and a Nikon D70 DSLR. He found the SW-CY “worked very well” on the Olympus with auto white balance — “nearly all of the images looked fantastic straight from the camera” — and produced excellent results on the D70 when shot in RAW with custom white balance. A key finding was that UR Pro filters produced more pleasing auto white balance results than CC Red gel filters (^[17]).

The Magic Filter Revolution (2005-2011)

The most significant development in ambient light photography came with the Magic Filter, developed by Alex Mustard and Peter Rowlands. Announced in August 2005, Magic Filters took a fundamentally different approach than previous underwater filters (^[18]).

Unlike traditional filters designed to perfectly counteract the filtering effect of seawater (which varies constantly with depth and water conditions), the Magic Filter was “not designed to perfectly counteract the filtering effect of seawater.” Instead, it adjusted colors reaching the sensor to produce a balance “that is easily corrected by the camera’s white balance.” This was described as “a new approach for underwater filtration, one that takes full advantage of the new technology of digital still cameras.” The Magic Filter worked from the surface down to 15 meters and produced reasonable results to at least 17 meters (^[19]).

Magic Filters were produced as optical quality gels, pre-cut to fit popular SLR wide-angle lenses such as fisheyes and ultra-wide zooms — lenses that could not accept screw-on glass filters. This solved a key problem: “DSLR photographers had — that there weren’t filters for our fave lenses” (^[20]).

Mike Veitch published an extensive field review on Wetpixel in October 2005, testing the Magic Filter in conditions ranging from murky green water at 50 feet to clear shallow reefs. As a full-time underwater image maker with extensive video experience, Veitch brought particular insight: “In the realm of underwater video, the red filter is king. When shooting video without lights and manually white balancing off a slightly off white slate, rich saturated colour can be captured from further away than what can be obtained using strobes on a still camera” (^[21]).

A significant finding was that the filter could be used in combination with strobes — by white balancing with strobes turned on, the camera compensated for the filter’s color cast, allowing photographers to shoot both filtered ambient and strobe-lit subjects on the same dive. Veitch concluded: “I am extremely pleased with the performance and versatility of this new tool” (^[22]).

Key milestones in the Magic Filter line:

• 2005: Original Magic Filter launched as pre-cut gels for DSLR lenses (^[23])
• 2006: Auto-Magic Filter launched for compact cameras, designed to work with automatic camera settings (^[24])
• 2008: Magic Filters and UwP Magazine shared a booth at DEMA Show; the instructional DVD Shooting Magic was announced (^[25]). Steve Williams reviewed an advance copy for Wetpixel, noting that the DVD’s format — six dives with Alex in the Red Sea, three with a DSLR and three with a compact camera — provided “an incredible way to learn the correct approach to getting the most out of the filters.” He highlighted practical benefits visible in the video: “Hey, he’s not lugging strobes around,” “There is no backscatter, none,” “He can fire as many shots as fast as he wants” (^[26])
• 2009: Shooting Magic DVD officially released — 90 minutes of chaptered instruction filmed over 6 dives in the Red Sea with Mustard shooting both DSLR and compact cameras, produced by Peter Rowlands (^[27])
• 2011: External-mounted solid Auto-Magic Filter released in screw-on format, allowing the filter to be added or removed underwater (^[28])

Complementary Filter Photography (2007)

James Wiseman advanced the field by introducing complementary filter photography in a 2007 Wetpixel article, building on Craig Jones’s experimental work. The technique used a filter on the camera lens to reject undesirable ambient light (e.g., a CC30M magenta filter) paired with a complementary filter on the strobe (e.g., a CC30G green filter). This allowed the strobe to produce light that appeared natural through the lens filter, combining the benefits of ambient light color correction with strobe-lit foreground subjects (^[29]).

Wiseman tested the technique in Little Cayman, comparing side-by-side shots with and without filters. A significant bonus was improved sunburst rendering: “A filter on the lens which removes some cyan light basically lets you get the same blue water exposure that would result in a blown-out sun, but instead, the green/blue ring around the sun is removed” (^[30]).

Alex Mustard commented on the article, noting the magenta lens filter had the additional effect of darkening the water background relative to the strobe-lit foreground, “which often creates more dramatic pictures” (^[31]).

Mainstreaming of Filter Photography (2005-2006)

The rapid adoption of filter techniques was reflected in their integration into formal diving education. In late 2005, PADI announced its new Digital Underwater Photographer specialty course, structured to teach “new techniques made possible with digital cameras, such as filter photography” from the outset. Notably, the course was designed from scratch rather than being a traditional underwater photography course with digital elements added on (^[32]).

Modern Filter Systems (2012-2019)

The action camera revolution brought filter photography to a new audience. In 2012, Backscatter announced a Flip-Up Color Correction Filter for the GoPro Dive Housing, featuring a unique design that allowed the filter to be raised in changeable light conditions to allow more ambient light, and lowered for color correction — all without removing the filter from the housing (^[33]).

Inon UW Variable Red Filter M67 (2017) used two coloured circular polarizing filters that could be rotated underwater to continuously adjust filter strength, adapting to changing depth without removing the filter. This addressed the longstanding problem of committing to a single filter strength for an entire dive (^[34]).

Keldan Spectrum and Ambient Filters (launched 2016, revised 2019) represented a comprehensive system. The Spectrum filters mounted on the lens provided depth-specific color compensation (the -2 version compensated for 4 meters of depth at the cost of 2 stops of light; the -4 version for 8 meters at 4 stops). The Ambient filters mounted on Keldan video lights adjusted their output spectrum to match the underwater ambient light at a given depth, allowing custom white balance and artificial lights to be used simultaneously with homogeneous color temperature across the frame. Massimo Franzese’s extensive 2019 field review at Tiger Beach, Bahamas, found “the color rendering of footage and stills far superior” when using the system (^[35], ^[36]).

Key Techniques

Silhouettes

Silhouette photography is the simplest form of ambient light shooting: expose for the bright background (typically the sunlit water surface) and let the foreground subject go dark. Large, recognizable subjects with distinctive profiles — sharks, manta rays, turtles, whale sharks, divers — work best. The technique requires no color correction since the subject is rendered in shadow against blue water.

The question of whether ambient light silhouettes represent a more “natural” aesthetic was debated on Wetpixel. In 2006, Eric Cheng highlighted a forum discussion sparked by Alex Mustard, who asked whether “non-underwater photographers prefer the look of underwater images taken in available light only? Or whether it is merely a reflection that the sorts of subjects that tend to do well in wildlife photo competitions (marine mammals, turtles and sharks) are often photographed in ambient light?” (^[37]).

Sunbursts and Sunballs

Capturing the sun as a defined ball or starburst pattern through the water surface is a characteristic element of underwater wide-angle photography. Digital sensors present a specific challenge: unlike film’s non-linear response, digital sensors respond linearly to light, causing the sun to quickly saturate blue and green channels before warm colors can be recorded. This produces a white blown-out area surrounded by a cyan ring rather than the warm sunbursts that film shooters achieved (^[38]).

Alex Mustard initiated a community discussion on digital sunbursts in 2005, noting that “digital can do a much better job at capturing sunbursts than many people think. But requires a different approach to film” (^[39]).

The Fuji S3 Pro and S5 Pro DSLRs, with their extended dynamic range Super CCD sensors, were anticipated as solutions for better sunbursts. Eric Cheng noted the S3 Pro’s 10-stop dynamic range in its “Wide 2” mode “sounds like great news for underwater guys looking for nice sunballs” (^[40]). However, testing by Wetpixel member Claude Ruff in 2007, comparing the S5 directly against the Nikon D200, showed that despite Fuji’s increased dynamic range, there was no noticeable sunburst improvement over the D200 (^[41]).

Neutral density graduated filters offered another approach. In 2005, Berkley White of Backscatter developed a system where a graduated ND filter could be mounted on a fisheye lens and rotated using the housing’s zoom control to position the dark portion over the sun. This allowed the photographer to properly expose both the sunlit area and the ambient-lit foreground (^[42]).

James Wiseman’s complementary filter technique also improved sunbursts as a side effect. The magenta lens filter blocked the excess cyan light around the sun that caused the characteristic digital blowout, resulting in cleaner, warmer sunballs (^[43]).

Slow Shutter / Motion Blur

Slow shutter speeds (typically 1/4 to 1/15 second) can be combined with ambient light to introduce motion blur, creating dynamic, painterly images. Nick More, who discovered the technique during a 2016 trip to the Bahamas with Alex Mustard, became its foremost practitioner. His work using accelerated panning, zoom blur, and spin/twirl techniques with both front and rear curtain flash synchronization earned him British Underwater Photographer of the Year (UPY) in 2020 and Runner-up at Underwater Photographer of the Year (UPY) in 2017. As More explained: “These pictures all rely on small apertures to control flash, low ISO to control ambient light, and high-power flash guns to freeze the subject in the frame by over-powering the ambient light” (^[44]).

Cenote and Cave Photography

Mexican cenotes and cave systems have become a showcase for ambient light photography. The crystal-clear freshwater and dramatic light beams penetrating through sinkholes create natural lighting conditions that are ideal for wide-angle ambient light work.

Martin Broen documented the cenotes using a Sony a7rIII with a Nauticam housing and WWL-1 wet lens, working with “natural light close to the cenotes” and supplementing with video lights deeper in caves. The gin-clear freshwater provided “some of the best visibility in the world” and the environment pushed “low light photography skills” (^[45]).

Natalie Gibb developed a distinctive approach to cenote photography using video lights (particularly Keldan lights with high CRI) instead of strobes, preferring “the softness and subtlety of using just enough light to show the cave.” Her work used ambient light from cenote openings combined with strategically placed video lights to create theatrical compositions. Jill Heinerth told Gibb her photos “looked like I was setting up stage lighting” (^[46]).

Wetpixel and Under the Jungle hosted annual cenote photography workshops beginning in 2021, with Natalie Gibb, Tom St. George, and Adam Hanlon teaching cenote shooting techniques. During the 2022 workshop, Tom St. George and Adam Hanlon presented evening sessions covering “key ideas about shooting in ambient light” (^[47]).

Jason Gulley documented Florida’s springs system using a Nikon Z6 with the 14-30mm f/4 lens, extensively experimenting with long shutter speeds (up to several seconds) combined with rear curtain flash to create motion blur effects. He noted: “Nearly all of my dives are limited by camera battery capacity” — a testament to the extended shooting sessions that ambient light work enables (^[48]).

Model Photography Without Strobes

Ambient light photography has found a niche in underwater model and fashion photography, where the even, soft illumination and absence of harsh strobe falloff create a more natural and flattering look. Adam Leaders demonstrated this in a 2019 shoot on the HTMS Sattakut wreck in Koh Tao at 27 meters depth, where he shot a model using only ambient light in high-speed burst mode. The distance between photographer and model made strobes impractical: “strobes were not needed allowing me to shoot in high-speed burst mode. This gave me a massive advantage in getting the right shot as the timing was crucial” (^[49]).

Mike Veitch’s 2005 Magic Filter review also demonstrated filter photography’s value for model work: “One of the problems with model photography is it is difficult to properly expose both the main subject and the model when using strobes. This is due to composition and strobe to subject distance when the two subjects are often at different distances from the camera.” The Magic Filter solved this by providing even color rendition across the entire frame regardless of distance (^[50]).

Filters vs. White Balance Alone

A persistent misconception in the digital era is that filters are unnecessary because white balance can be adjusted electronically. Craig Jones addressed this directly in 2003: “With the advent of digital photography and electronic white balance many say that filters are unnecessary. That is simply not true. Electronic adjustments occur after the picture is taken and only serve to modify its presentation. Filters work before the image is taken and fundamentally alter its content.” When the light entering the camera is predominantly green, the camera must set exposure based on that green light, degrading the quality of red and blue channels. A filter that brings green into proper balance produces a higher-quality image at capture. The filter also helps control diffused light, improving contrast (^[51]).

Alex Mustard’s Magic Filter made the same point in simpler terms: “Unlike the camera’s white balance feature — which alters the mix of light already collected by the sensor — the Magic Filter alters the mix of light before it enters the lens. Since reds and oranges disappear from the underwater spectrum quickly, the Magic Filter provides a better mix of light for the camera’s white balance function to utilize” (^[52]).

Keldan’s 2019 approach confirmed this principle remained relevant: their Spectrum filter corrected colors before the sensor, while their Ambient light filters on video lights matched the light source spectrum to the ambient underwater spectrum, enabling camera white balance to achieve natural-looking results across the whole frame (^[53]).

Equipment and Accessories

Strobe Filter Holders

Complementary filter photography required a way to mount filters over strobes. In 2004, Marine Camera Distributors began selling a Cokin P-series filter holder for the Inon Z-220 strobe for $14.95, enabling easy use of cyan or green gels for fill-flash with magenta/red lens filters. Craig Jones had previously used the more expensive Lee filter system (^[54]).

Community member Viz’art suggested theatre lighting supply stores (Rosco filters) as an inexpensive source of color-correcting gels, noting “ten bucks will supply your average dive club” (^[55]).

Neutral Density Graduated Filters

Berkley White of Backscatter developed a graduated ND filter system for fisheye lenses that could be rotated using the housing’s zoom control, specifically to control sunburst exposure. The system was housing-specific, requiring custom gear assemblies (^[56]).

Wetpixel Live Discussions

Ambient light photography remained an active topic in Wetpixel’s educational content. In July 2020, Adam Hanlon and Alex Mustard discussed TTL flash with fast-moving subjects in a Wetpixel Live episode, which “digresses into a discussion about shooting bigger subjects and when it might be appropriate to use filters to improve color in our images” (^[57]). A dedicated episode on “White Balance and Water Color” (Ep 40) covered the fundamentals of how water affects color and why in-camera correction matters for ambient-light shooting, while “Defining Quality Light” (Ep 166) explored how to identify and exploit optimal natural lighting conditions underwater (^[58], ^[59]).

Key Figures

• Craig Jones — Pioneered the technical framework for underwater ambient light still photography through his 2003 Wetpixel articles; developed the complementary filter concept
• Alex Mustard — Co-developed the Magic Filter with Peter Rowlands; reviewed UR Pro filters; contributed extensive practical and educational content on filter photography
• Peter Rowlands — Co-developed the Magic Filter with Mustard; produced the Shooting Magic instructional DVD; publisher of UwP Magazine
• Mike Veitch — Provided influential early field review of the Magic Filter; brought video filter expertise to still photography
• James Wiseman — Developed the complementary filter technique for combined strobe and ambient light shooting
• Kurt Amsler — Veteran professional photographer who advocated for ambient light mastery as essential to creative underwater photography

Timeline

• 2003-06: Craig Jones publishes “Filters and Ambient Light Photography” on Wetpixel, providing the technical framework (^[60])
• 2003-07: Jones publishes “Feature: Ambient Light Photography” with Alex Mustard photos (^[61])
• 2004-03: MCD releases Inon Z-220 filter holder for complementary filter use with strobes (^[62])
• 2005-05: Alex Mustard reviews the UR Pro SW-CY shallow water filter (^[63])
• 2005-06: Berkley White develops graduated ND filter system for sunburst control (^[64])
• 2005-06: Wetpixel community discusses digital sunburst techniques (^[65])
• 2005-08: Magic Filter launched by Alex Mustard and Peter Rowlands (^[66])
• 2005-10: Mike Veitch publishes Magic Filter field review (^[67])
• 2005-11: PADI announces Digital Underwater Photographer specialty course incorporating filter photography (^[68])
• 2006-08: Auto-Magic Filter launched for compact cameras (^[69])
• 2006-10: Community debates whether non-UW photographers prefer ambient light images (^[70])
• 2007-03: Fuji S5 vs. Nikon D200 sunburst tests reveal no advantage from extended dynamic range (^[71])
• 2007-06: James Wiseman publishes complementary filter technique article (^[72])
• 2008-12: Steve Williams reviews advance copy of Shooting Magic DVD for Wetpixel (^[73])
• 2009-02: Shooting Magic instructional DVD officially released (^[74])
• 2011-04: External-mount solid Magic Filter released for underwater swapping (^[75])
• 2012-05: Backscatter announces Flip-Up Color Correction Filter for GoPro dive housing (^[76])
• 2017-08: Inon announces variable-strength red filter with adjustable polarizing elements (^[77])
• 2019-02: Keldan publishes filter tutorial videos explaining Spectrum and Ambient filter systems (^[78])
• 2019-05: Massimo Franzese reviews Keldan Spectrum and Ambient filters for Wetpixel (^[79])
• 2020-04: Martin Broen’s cenote ambient light portfolio featured on Wetpixel (^[80])
• 2020-05: Nick More’s motion blur portfolio showcases slow shutter ambient light technique (^[81])
• 2020-07: Wetpixel Live episode on TTL and ambient light shooting (^[82])
• 2022-04: Wetpixel/Under the Jungle cenote photography workshop covers ambient light techniques (^[83])

References

Wetpixel Live