Albinism is an inherited condition that results in the absence, or near absence, of pigmentation in the eyes, skin and hair.
Many people living with albinism are subject to negative public attitudes, persecution and violence.
Dingwall's project began with portraits of Thando Hopa, a legal prosecutor using her visibility to address the negative perceptions surrounding albinism.
More recent work features Sanele Xaba, a young model with albinism, and uses specific elements to create symbolic meanings.
"They are not about race or fashion, but about perception, and what we subjectively perceive as beautiful," says Dingwall.
"I wanted to create a series of images that resonate with humanity and make people question what is beautiful.
"To me diversity is what makes humanity interesting and beautiful."
Drawing on elements from nature, Dingwall aims to alter the viewer's perspective.
"The butterfly unquestioningly embraces the changes of their environment and their body," says the photographer.
"For this reason, butterflies have become symbols of growth, surrender, transition, celebration, resurrection and fragility."
In images such as Cerasinus and Indicum, Dingwall paints with light, using bold colours that neutralise the perception of skin tone.
Albinism is particularly prevalent in Tanzania, with one in 1,400 affected, according to a 2006 BMC Public Health report.
This compares with one in 20,000 in Western countries.
Since 2000, at least 75 people with albinism have been killed in targeted attacks in Tanzania.
Many are killed because potions made from their body parts are believed to bring good luck and wealth.
All photos: Justin Dingwall

South Wales Police has confirmed that the matter is closed and that the three complainants have been told.
The force said it has informed Operation Hydrant, which oversees allegations of historical child sex abuse against high-profile people.
Lord Tonypandy, who was born in Port Talbot, died of cancer in 1997 aged 88.
Then known as George Thomas, he was a Labour MP in Cardiff from 1945 to 1983.
The methodist preacher was also Secretary of State for Wales from 1968 to 1970 and was Commons Speaker between 1976 and 1983.
Allegations of historical child sexual abuse were made against him four years ago.
A man, now in his fifties, living in Australia, alleged that Lord Tonypandy had sexually assaulted him in Cardiff when he was nine years old while he was staying at the boy's parents home in the 1960s and 1970s.
Other allegations against him included that he sexually assaulted a 16 or 17-year-old boy on a train between Newport and London in the 1960s.
There were also claims he inappropriately touched someone on a train from London to Aberystwyth in 1959.
On Wednesday, South Wales Police said its investigation has come to an end and that no further action would be taken.
"These allegations have been investigated proportionately by South Wales Police in line with national guidance," it said in a statement.
"The force takes all allegations of sexual abuse seriously no matter when the alleged offence took place and encourages any victims of sexual abuse to come forward, in the knowledge that they will be listened to and their allegations taken seriously."
Friends and people who knew Lord Tonypandy have previously said they found the allegations difficult to believe.
South African photographer Justin Dingwall's portrait series Albus explores the aesthetics of albinism and perceptions of beauty.
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An investigation into sex abuse claims made against the former Speaker of the House of Commons Viscount Tonypandy has ended.