Ashton Kutcher launched the effort by tweeting his involvement in the Nikon Film Festival, a user-generated content contest

Nikon is taking a cue from the popularity of Twitter by using the microblogging service as a launchpad for a new promotion.

Yesterday, actor Ashton Kutcher kicked off the campaign by tweeting his involvement in the Nikon Film Festival, a user-generated content contest for people to submit “a day through your lens” video for the chance to win $100,000. Kutcher, who has 3.9 million followers on the service, posted a link to his own submission, a short film documenting a day he spent in Africa with his actress-wife Demi Moore.

“Check out my short film documenting a recent trip to Africa. Let me know what you think,” Kutcher wrote.

The campaign, which promotes the Nikon D5000, is taking more cues from Twitter by requiring users to keep their submissions to 140 seconds.

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