This lightweight module provides a simple 500px photos block for a given username.
Get Latetst Photo from 500px website for a given username.

Currently, only one default block is provided and is configurable via the blocks admin interface. 
To set up the default block, go to Admin > Structure > Block. Then enable and configure the default block.

The configuration form resides at admin/config/development/photo500px.

This module will never provide advanced 500px integration like OAuth.