Talk:Focus/@comment-125.230.210.42-20151204034302/@comment-198.48.192.30-20151204075258

Let's say you want to install it on a warframe you enjoy playing a lot.

Go to Arsenal, select the warframe of choice, then click on Action at the bottom right. You'll find a new 5th button called Focus Lens (or something of that nature) to the far right. Click on that assuming you have a lens, and install it. You'll get a prompt to ensure your choice. Remember, this is permanent, so choose wisely.