An inner Sydney unit manager allegedly used hidden cameras to film intimate images of residents without their knowledge, with police finding more than 50 videos.

The 49-year-old man, James Maxwell, was arrested on Friday afternoon, three days after one of ten residents from a unit on Bunn St at Pyrmont found a camera hidden in a digital alarm clock in the bathroom.

Police say officers found two more hidden cameras in the unit.

An inner Sydney unit manager, James Maxwell, allegedly used hidden cameras to film intimate images of residents without their knowledge. (9NEWS)

After speaking with the manager, officers found another hidden camera in a different unit in the same complex, as well as a hard drive, night vision equipmentand other devices.

Maxwell allegedly had more than 50 videos featuring intimate images of the two units' occupants.

Resident Anton Steinbrewner told 9News one of the camera hidden in a clock had been installed behind one of the digital numbers.

Resident Anton Steinbrewner told 9News he found one of the cameras hidden behind the digital six figure in an alarm clock. (9NEWS)

"There was a tiny, tiny camera hidden in the digit six," he said.

"(It makes me feel) disgusting - especially as I was considering him (Maxwell) my friend."

Maxwell is due to appear at the Downing Centre Local Court on December 19 charged with 11 counts of recording intimate images without consent.

It is believed the cameras were used by Maxwell to be able to watch residents on his mobile phone without their knowing. (9NEWS)

Further charges are likely, police say.