Severely mentally disabled man shackled in Juba Central Prison in Juba, South Sudan in Jan. 2011.
Robin Hammond—Panos
September 3, 2015 12:01 AM EDT

Developing a long-term documentary project requires a combination of dedication, time, and funding. Without all three, completing a polished product is nearly impossible. But finding ways to fund these projects over the years has become difficult, especially in a market where editorial assignments are in decline.

TIME LightBox selected five of the most successful documentary projects and spoke with the photographers asking them how they funded their work.

Contact us at letters@time.com.

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