there is a point at which so many of your pistels will darken...check around this sight on a search.. i think it's at about 75% darkened pistels (hairs) and it's ready.... i don't know what a magnifying glass would do as every strain is different.........
Damn that shit looks about done nice job man...i can not wait for that day i am so far away from that right now..damn..
PS..i have read that if you let it go TOO LONG that potency can start to drop....i think i read that in H.T. of a grow book...i can'yt remmeber good luckk peace