What strains are those? Different strains have different flower lengths. Most indica's are around 8 weeks....but sativas can take up to 12 weeks. Looking at those pics it seems like your buds still have awhile. That last pic especially. It's hard to give an exact amount of time, you just have to keep your eye on them. I'd invest in a small jewelers loop. You can get one on Amazon pretty cheap. I got this one and it works great. :jointsmile:

Amazon.com: Jeweler's Loupe - 30X: Home & Garden

Can you show a pic of the whole plant?