Mark Wayne Weaver, 47, was sentenced in the County Court after pleading guilty to 24 charges over child pornography and child sexual offences committed between February 1997 and April 2007.

Judge Barbara Cotterell said Weaver's victims would undergo psychological suffering as a result of his predatory activities and characterised his offending as very serious.

She said Weaver, an electrical engineer, took photos of teenage girls in erotically suggestive poses and in some cases forcibly undressed them, touching them without consent in the process.

The court heard Weaver met his victims while they worked at supermarkets or service stations.

With a campaign of flattery, offers of money and promises of a career in modelling, Weaver convinced the girls to pose on cars and motorbikes in clothes and bikinis he provided.

She said one victim found his sexually explicit text messages disturbing, while another felt sick and dirty after Weaver, who forced her to pose in a small child's bikini, pushed her hand aside to reveal her breasts while he photographed her.

In one case, Weaver initiated contact with a 14-year-old girl using an internet chat network.

Between November 2006 and April 2007, the pair exchanged 12,939 mobile phone messages, 8492 of them coming from Weaver.

Judge Cotterell said Weaver stalked his teenage victim over this period and organised face- to-face contact in a supermarket carpark where he grabbed and kissed her.

At other times he arranged meetings at the girl's rural home or at secluded spots nearby. He gave her skimpy underwear and asked for photographs of her wearing it. He asked if the girl loved him and suggested the pair exchange gifts to mark anniversaries, and later, when confronted by the girl's mother, he denied knowing or seeing her.

Judge Cotterell said Weaver's seduction of a 14-year-old girl was abhorrent and the community would not accept the procuring of children for pornographic purposes.

In November last year, Weaver pleaded guilty to charges including indecent assault, indecent acts with a child under 16, sexual penetration of a child under 16, having procured a child for creating pornography, possession of child pornography and various Commonwealth charges.

He was sentenced as a serious sex offender and will serve a minimum of four years.

• Weaver has been in custody for more than two years since his arrest in 2007.

Courtesy of The Age