SEO on photoblog?

Hi guys!
I have been here for a while, but I'm only reading and learning. Especially the Blackhat stuff, 'cause I've always done it Whitehat way.

So my question is - how can I make a good optimization on a blog filled with photos?

Thanks in advance!

edit :
It's gonna be on Blogger

No1 knows? :/

Good alt tags and description of the photos to add text content.