Sta.sh
It's purpose is simple, as quoted on the page:
LENSBLR is a community of Photographers and some curators who are using Tumblr as their way to express themself.
Here you can discover new photographers of all levels and from all over the world. You can also vote and promote other people, and get promoted yourself. This is an open network.
Sounds nice, doesn't it? Now all you've got to do is check it out for yourself
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Artistic 
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