A Kingfisher Drive man pleaded guilty to 11 offences of making and possessing child pornography when he appeared before a court last Friday.
Mark Saltmer (39) also admitted brfore York Crown Court to presenting the police with a false letter of confession from another person after the photographs and movies involving children were found by the police.
Alan Mitcheson, prosecuting, told the court that Saltmer may also face a further charge involving child pornography.
The existing child pornography offences date from a period between April 2010 and March of last year. The offence of attempting to pervert the course of public justice was committed between June 2012 and March of this year.
The pornographic images involve videos including the most serious category of material available and photographs of all but the most serious level.
Saltmer pleaded guilty to four charges of making photographs, five of making videos and one of possessing a total of 65 pornographic photographs and 18 pornographic movies.
Mr Mitcheson told the court that following the discovery of the pornographic material, Saltmer presented the police with a letter, purportedly signed by Stanley Saltmer and falsely claiming that it was he who was responsible for the offending.
The case was adjourned for a pre-sentence report to be prepared on Saltmer, who has no previous convictions.
Matthew Donkin, defending, told the court that medical reports were also required, with Saltmer possibly suffering from mental health issues.
Saltmer will appear for sentencing on June 14 and Judge Neil Clark warned him on Friday that all options, including custody, would be under consideration.
The court also ordered Saltmer to sign the Sex Offenders Register - the final length of this order will depend on the sentence he receives. He was granted unconditional bail until the sentencing hearing.