Yep - post and article are the same thing. There's a bit of work in this so if you're not sure how to code in the magic try searching the forum - others may have been down the path and posted code.
{% for article in blogs.photos.articles %}<!-- Do your magic --> {% endfor %}
You'll need to not only loop over the articles, but also:
- be able to loop past the 50 limit (javascript) - if you have that many posts of course.
- extract the image from the post (liquid). There is code on the forum for that.
- add the masonry code (javascript)
- if you've got a responsive theme that could add some other complications.
With so many pics you may want to consider doing some smart image loading for more efficient page load. Not essential though.