The 24 HOUR PHOTO CHALLENGE is an online photography contest where the competitors receive the contest rules and regulations at a specified hour and have only 24 hours to shoot, edit and submit their photo to the judges.
You can use any camera you have for this challenge. Anybody can participate. Just go to the Facebook page and click Attending.
Mustafa Davis is a judge and sponsor of the contest and is an extremely talented photographer, you should take a look at his work.
I should also mention that the contest is sponsored by, among other companies, Zenhom, my brother's clothing company.
More contest and prize information is available here.