Yes that's fine. You don't have to ask every time you want to post something, as long as credit is always given. I think I have enabled the share feature on most of my work (on the right side of the deviation description) and that is the quickest way to blog it on tumblr. I follow your tumblr by the way and enjoy most of the stuff you post.
Amazingly beautiful!!! I love your pictures the style is very elegant, dark, rafinate whe easily guess that it represents a lot of work and technic. It looks like the pictures of a dark fashion magazine it is so beautiful I am really glad that I discovered your art work because I enjoy a lot watching at your pictures!! Best regards =*