It meant the court could not give him credit for remorse.
"There is a very real need for me to denounce this type of behaviour and to make it very clear that it is simply not acceptable in our society," Judge Harvey said.
Although Tiller was assessed as a high risk of reoffending, the Crown did not apply for a minimum non-parole period.
His lawyer, Arthur Fairley, said the reason Tiller's assessment was high was because he did not agree with the jury's verdict.
In her victim impact statement, one of the complainants said: "My life has changed and my attitude towards everything has changed.
"If my mind is not occupied frequently, I find myself thinking about the past in a very negative way, she said.
Judge Harvey said Tiller was entitled to some credit in that he had a blameless past and had been a useful, well-liked citizen admired by a large number of people. Tiller was supported in court by a large number of family and friends.
Mr Fairley confirmed an appeal had been lodged. No date has been set for the hearing.