His repertoire of royal adventures includes taking the official portrait of the Queen, as well as heading on a tour with Prince Harry and Meghan Markle around Australia.
Mr Jackson told PEOPLE: “The thing I love about royal photography is the depth with which you get to know your subjects.
“Celebrity photography is one thing — you are photographing a much bigger roster.
“With royals you have the opportunity to build up an in-depth knowledge of their personalities.”
In his time as a photographer, Mr Jackson has come to see how differently the members of the Royal Family act as part of their duties, and he uses this knowledge to portray them effectively through his photography.
One particular member of the family that Mr Jackson has gained a close bond with is Prince Harry, who he toured Southern Africa with as well as travelling to the ground-breaking Invictus Games.
Mr Jackson explained: “Harry has a real energy to his engagements.”
Mr Jackson is set to return to the Invictus Games next Spring with Prince Harry, and says Harry has “an element of unpredictability which has always been special.”
He continued: “One example of that was when he joined in a charity run in Rio de Janeiro and he ended up finishing the race with a face mask on.”
The royal photographer also gave an insight into other members of the family as he told PEOPLE: “The Prince of Wales is very interactive with people and expressive.
“The Queen moves about engagements in a different way to the Prince of Wales.”
But Mr Jackson has said that his role as a photographer is all about getting the right image of the royals.
He said: “It is about anticipating about what is going to happen — that’s a really key part of the job.
Looking at where the light is going to fall, and looking at where they are going to be and who they are going to meet.”
Mr Jackson also showed how much he enjoyed photographing the royal children as he said they “always makes you smile behind the camera, and I love that.”
He described any engagements he has had with the children as “a different, exciting kettle of fish” due to the “real energy” which comes from these engagements.
He added: “It is a less regular event, but equally that’s what makes it so special.”
Despite the Duchess of Cornwall facing flack following has been vilified the death of Princess Diana in 1997, Mr Jackson was full of praise for Camilla, describing her as “absolutely awesome to photograph”.
Mr Jackson continued: “Taking a picture is the most honest thing you can do — it is a record of exactly what happened at that second.”
“She understands that, and understands that you are doing a job.”