Judge Thokozile Masipa sentenced the South African athlete to five years in prison for killing his girlfriend Reeva Steenkamp.
She also gave Pistorius a three-year suspended sentence for a firearms charge.
REEVA STEENKAMP FAMILY: 'WHEN I HEARD OSCAR HAD SHOT HIS GIRLFRIEND, I PRAYED HE WAS CHEATING ON REEVA'
Shortly after the news broke, model and presenter Katie Piper, who was victim of an acid attack in 2008 which was arranged by her ex-boyfriend who is now serving a life sentence, took to Twitter to express her anger.
She tweeted to her 277,000 followers: "Disappointing!
"Reeva family must be shocked, gutted and crushed all over again #nojusticeforReeva"
She added furiously: "[He] will probably be out in half that.
"If somebody shot a member of my family dead and they died terrified in pain I wouldn't feel 5 years is justice.'
OSCAR PISTORIUS TRIAL IN PICTURES
Oscar Pistorius must serve a minimum of one sixth of his sentence. After that he may be allowed out of prison and serve the remainder under house arrest.
His legal team think that means they could have him home after just 10 months in prison.
However, the South African state prosecutor says it is more likely Pistorius will serve a third of his sentence in prison. That would be something around 15 months behind bars.
Reeva's mother June, when asked about the prospect of Pistorius being out of prison in a year, insisted the length of his sentence 'doesn't matter'.
She said: "It doesn't matter, he's going to pay something."
Asked if she thinks justice has been served, she answered simply "yes".