It could be called a number of things. "A good photograph" would be the most common one. "Luck" might be used in the case of someone who doesn't have particularly high skills in Photography.
When people have their photograph taken, they are said to be posing.
A picture or likeness obtained by photography., To take a picture or likeness of by means of photography; as, to photograph a view; to photograph a group., To practice photography; to take photographs.
meiosis
A photograph.
A Photograph
simplicity is a close up of the subject in the photograph. it must take most of the space in the photograph too.
Enlarging or resizing
It is called a micrograph.
a camera or smart phone
with a camera
Unless the job is work for hire or work for employer the photographer holds the copyright.
Earthrise is the name given to a photograph of the Earth taken by astronaut ... Rowell called it "the most influential environmental photograph ever taken