Reading a victim impact statement to the court, the mother said she and Hall starting going together when she was 15, and were together for more than three years.
She said Hall "always" offered to look after the baby, and she never saw any sign of him not being able to cope, and had accepted his explanations for bruising which he put down to such things as a seatbelt being too tight.
She had been aware the baby would cry whenever Hall held her, but said: "I now realise it was because she was scared of him."
She had trusted him to be alone with the girl, but told the court: "I don't understand why he put himself in that situation when he couldn't cope.
"He did nothing to help his suffering daughter.
"He even tried to stop me going to the doctor.
"James had so many opportunities to say what was going on," she said, struggling to comprehend how he could deny responsibility, "right up to the time" of the police arrival claiming the injuries were caused by the child rolling off the couch.
Each charge carried a maximum penalty of seven years' jail, but the judge set three years and three months as a starting point for determining the outcome, meeting almost half-way the respective claims of Crown prosecutor Russell Collins (about four years) and defence counsel Scott Jefferson (two and a half years).
She deducted 20 per cent to recognise his youthfulness, and another 25 per cent for the admissions, which alleviated any need for a trial.
The mathematics took it to just under two years, the threshold at which she could consider home detention, which she conceded would in a case such as that before the court be "very rare".
"Anyone who thinks home detention is a soft option should think again," the judge said.
She added that "many people" sentenced to home detention soon start to think they might be "better off in prison," because of the extra "freedom".
She approved a Hastings flat as the address where Hall must remain 24/7 for the next year unless allowed otherwise by his probation officer.
He is not to have care of or be alone with anyone aged 10 or under.
While Hall was laid-off as an apprentice painter and decorator and is currently unemployed, the judge was concerned that he should be able to complete his apprenticeship, and be in a position to financially support his daughter, and declined to order any community work.
Meanwhile, Hall's former employer, having listened to months of "explanations" as he helped Hall before learning of the child abuse and charges only after the admissions in May, is stunned the convicted man is now suing him for wrongful dismissal.
It was a seasonal layoff, he said, with Hall having held his job through a similar period last year.
