"Adam'' gained the woman's trust and she sent him naked photos of herself.
In 2011, Needham created another fake identity called Chris, who claimed to have bought a secondhand laptop with photos of her on it.
Posing as 'Chris', Needham told the woman he would upload the pictures to Facebook unless she provided him with more.
"As a result of the threats, [the woman] sent 'Chris' naked and partially naked photographs of herself,'' Justice Ailsa Duffy said.
The next woman was blackmailed in 2012, after Needham obtained photos of her wearing lingerie when she was a teenager.
He found the woman's Facebook account and from a fake profile he set up, which used a photo of the woman as its main picture, send her messages asking for more photos. If she didn't do that, he would post the ones he had on 10 different websites.