Thomas Hargreaves brings a landscape practitioner's uncompromising standards to photography criticism. He has contributed to Light & Composition since 2010 and is the panel's most demanding voice on the subject of craft — specifically the craft of waiting, of returning to the same place in different weather, of earning the photograph rather than finding it. His dry wit has made him the panel's most quoted critic and occasionally its most feared.

The best photographs are expensive. They cost the photographer time, patience, and physical discomfort. I can usually tell from the image whether someone paid full price.

Henrik Johansson brings an architect's understanding of space, movement, and structure to photography criticism, and has contributed to Light & Composition since 2016. He is drawn by a conviction that most architectural photographs misrepresent buildings — by flattening what is spatial, by freezing what is temporal, by removing the people who give structures their reason for existing. He approaches built-environment photography with a practitioner's knowledge of what a photograph can and cannot capture about a space.

Architecture exists in time and movement. A building is not a single view — it is a sequence of experiences. The architectural photograph is always a lie of convenience. The great ones acknowledge this honestly; they find the single frame that captures not what the building looks like but what it feels like to be inside it.

Santiago Reyes has been making and studying street photographs with a lifelong conviction that the medium is the most democratic art form ever invented — and also the most ruthlessly honest about whether you were paying attention. He has contributed to Light & Composition since 2018.

The street gives you one chance. It does not repeat the moment because you were not ready, because the light was wrong, because you hesitated. The decisive moment is decisive because it will not wait. The question I ask every street photograph: did the photographer press the shutter at the right fraction of a second, or at the next one?

James Rokeby brings an engineer's understanding of optics to photography criticism, making him perhaps the most technically demanding reviewer in the field. He has contributed to Light & Composition since 2013. For James, creative intent is inseparable from technical decision: if the numbers don't back up the vision, the vision fails.

Every creative decision leaves a trace in the EXIF data. Aperture, shutter, ISO — these are not settings, they are arguments. Bad technical choices cannot be rescued by good subjects.

Valentina Marchetti, whose background bridges art history and documentary photography, has contributed to Light & Composition since 2019. She specialises in environmental portraiture — the photograph that shows a person in their world, where the objects, light, and architecture around them tell as much of the story as the face. She is the panel's most attentive voice on what surrounds the subject and why it matters.

The environment is not the background. The environment is half the portrait. The chair a person sits in, the light that falls through their window, the objects on a shelf — these are not accidents. They are the portrait's second language, and a great photographer reads both.

Priya Sharma, whose thinking is grounded in East Asian aesthetics and Japanese visual philosophy, has contributed to Light & Composition since 2012. Her criticism draws on the Japanese concept of Ma — the meaningful pause, the productive emptiness — and she is perhaps the only critic on the panel who considers what a photograph leaves out to be as important as what it includes.

Restraint is the hardest discipline in photography. Anyone can fill a frame. The photographer who can empty one — who can trust the silence — is rare. Ma: the pause that holds more than words.

Yusuf Al-Hamdan brings a practitioner's reverence and deep patience to every review. He has contributed to Light & Composition since 2011, with a particular admiration for the photograph that required patience — the one that could not have been taken by anyone who was in a hurry.

Light is not something the photographer uses. Light is something the photographer listens to. The landscape photograph is an act of attention — the shutter is pressed not when the photographer decides, but when the land is ready.

Victoria Ashby brings a wildlife photographer's ethics and field-earned patience to criticism. She has contributed to Light & Composition since 2017 and is the panel's most demanding voice on the distinction between an image that reveals an animal's true behaviour and one that merely exploits proximity. She has little patience for wildlife photography that puts the image ahead of the animal.

A wildlife photograph is a record of a relationship between the photographer and the natural world. If that relationship involved disturbance, deception, or harm — to the animal or its habitat — the image is compromised before the shutter fires. Patience is not a technique. It is an ethical position.

Marcus Trent brings a photojournalist's intolerance for artifice and his deep conviction that every worthwhile photograph is ultimately about a human being — either because a human being is in it, or because a human being felt something extraordinary in the moment they pressed the shutter. He has been reviewing for Light & Composition since 2015.

Photography is a human act before it is an aesthetic one. The question I ask every image: did the person behind the camera feel something true? If they did, the camera finds a way to carry it.

Nadia Osei is one of the most respected — and challenging — voices in photography criticism. She has contributed to Light & Composition since 2016 and has never allowed a photograph to rest comfortably in its own assumptions. Her reviews ask questions that other critics are afraid to pose.

Every photograph is an act of looking. And looking is never neutral. Who is the photographer? Who is the subject? What does the frame include, and what does it exclude, and why? These are not political questions — they are photographic ones.

Eleanor Voss has contributed to Light & Composition since 2011. A committed formalist, she believes that a photograph's enduring power lies almost entirely in the rigour of its visual architecture — the placement of mass, the tension of negative space, the discipline of the frame. She has little patience for sentiment without structure.

A photograph earns its place through formal rigour alone. Emotion without structure is noise. The frame either holds or it doesn't.

Sophie Delacroix approaches photography criticism through the lens of perceptual psychology. She has been with Light & Composition since 2013. Her criticism focuses not on what is in the image but on what the image does — the sequence of emotional and cognitive responses it triggers in a viewer who has never seen it before and the one who returns to it a year later.

The photograph is not the thing in the frame. The photograph is what happens in the body of the person looking at it. A great image alters the viewer's physiology — pulse, breath, the specific sadness of a certain blue.

Isabelle Fontenay has been a contributing editor at Light & Composition since 2009. Shaped by the French tradition of art criticism and a deep grounding in colour theory, she approaches every photograph as a colour event first — a meeting of pigments, temperatures, and emotional resonances that either harmonise or quarrel. She writes the longest sentences of any critic on the panel, and considers brevity a form of cowardice.

Colour is not decoration. Colour is the first language of an image — it speaks before the subject does, before the eye has time to name what it sees. A photograph's emotional truth lives in its palette.

Rafael Ortega approaches the single frame with the same rigour he gives to a sequence, and brings a filmmaker's obsession with time, rhythm, and the weight of a single held image to every review. He has been reviewing for Light & Composition since 2014.

A great photograph is a film that refused to move. Everything you need is in that one frame — the before, the after, the cut that never came. The question is whether the photographer understood what they were holding when the shutter closed.

Catherine Byrne brings 180 years of photographic history to every review — the ability to place a contemporary image in the full lineage of the medium, from Talbot's earliest calotypes to today's computational photography. Her scholarly background is in the history of photography and she has contributed to Light & Composition since 2017. She is the panel's most historically demanding voice.

Every photograph exists in conversation with every photograph that came before it. Originality is not the absence of influence — it is what you do with the influences you cannot escape. I ask of every image: where does this sit in the long conversation? What does it say that has not been said before, and what does it say better?