Two police officers, a retired police officer and a pilot will go on trial next year accused of misusing the camera on a police helicopter to look at people who were naked or engaged in sex acts.
The four men were arrested as part of a South Yorkshire Police investigation into reports the force helicopter had been used for inappropriate filming.
Serving officers Matthew Lucas, 41, and Lee Walls, 46, appeared at Sheffield Crown Court along with former South Yorkshire officer Adrian Pogmore, 50.
Alongside them in the dock was Matthew Loosemore, 44, who was a South Yorkshire Police pilot before transferring to the National Police Air Service in 2013.
All four men pleaded not guilty to charges of misconduct in a public office.
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They were told they will go on trial on July 17, 2017.
Malcolm Reeves, 63, who was a pilot at South Yorkshire Police before retiring in 2013, is also charged in relation to the same case but did not appear at Sheffield Crown Court with the other four defendants on Tuesday.
The charges relate to four alleged incidents between 2007 and 2012.
One alleges misconduct which was "namely to observe and record a naked person without her knowledge and consent".
Another alleges misconduct amounting to "misusing police resources for purposes that were not connected to your employment, namely to observe and record persons performing sexual acts".
