Two convicted paedophiles were among those jailed in Lincoln in June.
Gordon Frow, 37, whose address was given as c/o College Close in Lincoln, was jailed for two years after showing an indecent photograph of himself to a nine-year-old girl.
Lincoln Crown Court was told that the still photograph showed Frow performing a sex act.
The girl’s reaction was to cover her eyes and to tell him to get the photograph off the screen.
Anthony Hayward, 33, of Princess Street, Lincoln, was jailed for six years after pretending to be a female university student during online conversations and encouraging a 12-year-old boy to strip.
Hayward also admitted to taking 27 photographs of another young boy, whose mother told the court she believed her son’s “innocence had been taken away.”
The images were found after police executed a search warrant at Hayward’s then home in Woodhall Drive, Lincoln, during March last year.