Time to harvest?

Not yet, you still have 10-14 days at least. Once there are 95-98% brown pistils/hairs, you will be entering the harvest zone. 50-60% brown pistils is waaaaay too early. Been growing for 40 years, this is what I look for.........about 98% brown pistils to indicate we are in the "harvest zone".

Almost wait another week.When all the leaves begin to fall off it will be ideal, this means that the plant transfers all the microelements to the fruits

Your right on the edge watch for some amber trichomes to develop then cut her down. It would do the trick now but you can wait your on countdown bud good luck and beautiful buds

Not too experienced however this I do know 🙏check the Trichomes , when they've started turning from a clear, transparent color to a milky white. With a few amber trichs your flower is ready to harvest check with a jewelers Loop or microscope or even a good magnifying glass the trichs on the buds hope this helps Good vibes your way and happy Gro

Couple weeks minimum

Generally, the white 'hairs' are a sign of flowers still growing. I would wait a little longer. Hope this helps, even a little.

Are you able to snap some pictures of the tricomes on the calyx? Sometimes phones have macrolenses or good zooms which can show the stage of tricomes. https://2fast4buds.com/static/img/94a6f9eb2765833c76f0b5377db9f46b.jpg Right here are the "3" stages of the tricomes. Usually u can harvest once Tricomes reach the Amber phase. Some people tend to go for max 30% amber some tend to do more like 20-15% amber and the rest cloudy.

Also you can try and shorten your light days go to 11hrs of light 13 hrs of darkness should help the plant think winter is coming and start to finish

Hey there your plant looks great Personally I like to wait till about 50 to 60% of the hairs change across the whole plant at that time it's when I start to really look and see if the plant is done. I suggest useing something to check tricombs but only check the ones growing directly from buds not sugar leaves those will turn way early. I like to look for most of the tricombs to be mily white where you can't see thru them and then the rest half clear and half amber You probably have about 1 week to 1o day maybe 14 days at the longest Just remember to be prepared for drying and curring don't wait till harvest to think of your plan. Drying and curring is very much an art I suggest getting mesh drying racks and to wet trim buds at harvest and put buds completely trimmed on mesh racks immediately it will help not getting rot or mold and when you leave the leaves when you dry the plant and you don't have the temp down low enough the leaves make the buds smell like old soggy