Brown Spots on Leafs

These brown spots just showed up on some of my leafs. Buds look still look good and healthy. Should I be worried about the brown spots? I got 3 to weeks before harvest...Any advice?? Here are pics of my buds and Brown Spots.

Bigger pictures please, my microscope is in the growhouse atm.

I can't make picture bigger. Can you not see the spots on the leafs?

Ah comon 150x113 pixels on a 1920x1080 monitor, what do you think?
For a good advice you need something bigger like 600x800 at least. You dont have to do it but it reduces your chance for help.