The Smithsonian Magazine is calling on readers to vote in its 10th annual Reader's Choice Award. Voters can select their favorite photo from among 50 finalists. This year's contest received 37,600 entries from 112 countries. The Magazine's editors will also select winners for five additional categories - Altered Images, American Experience, Natural World, People and Travel. Voting is open through March 29, 2013.

Musicians arriving at the bullring before all other guests to secure their seats.Photograph by finalist Raul Amaru Linares from Bogota, Colombia using the Nikon D7000.
Grandpa’s Helper Photographed by Jenny Braun from Hampton, Minnesota using the Sony DSC-HX9V.
A Day Laborer Works at a Chemical Drum Recycling Plant
Photographed by Raihan Parvez from Dhaka, Bangladesh. No mention about the gear used.
In One of the Small Churches in Nazareth
Photographed by Ilan Fain from Haifa, Israel using a a Canon 3D.
Apple Guy on Location in the Desert
Photographed by Ron Henderson from Dallas, Texas using a Canon EOS 5D Mark III

Twisted
Photographed and edited by Tim Wright from Omaha, Nebraska for the Altered Image category. He shot with the Canon EOS 5D Mark II and used the Photomatix HDR Pro and Photoshop CS3 software for post.