Can I harvest?

The fact that you mention not having a microscope or loupe should be an indication that maybe you should invest in one. The best way to see what’s actually going on is with your own eyes and trusting what you see. You have to learn to train yourself to see these visual cues. Once you know what to look for it’s really easy to know when to harvest based on your preferences. I tend to let my flowers go for a minimum of 8 weeks. As very rarely they ripen fast than that. So if you know what week of flower you’re in I would target 8 weeks. Week 6 is usually when I start inspecting and watching the tricromes progress. I agree with the others, you got time left to go.

Go order one. 5-10 usd is cheap. get one with a glass lense. You'll have plenty of time for shipping. this plant is not plump, so you have a while, yet. See how long the hairs "look?" the calyxes will plump around them making them seem shorter, but really the same length as before. You should not have super long hairs at harvest time except for a rare genetic oddity with super long stigmatas that i assume exists but not 100% on that, lol. there's a lot of genetic diversity out there.

You still have roughly 2-3 weeks to go. Once there are 98-99% brown pistils/hairs, you will be entering the harvest zone.

If you have a smart phone you can download a free microscope/ magnifying glass app on there, there's quite a few good ones you can use, looks like you still have abit of time left though.

How long has she been flowering for? It looks like she still has quite a while to go.