ya it is even hard to see if the colors of the pistils have changed, try taking a flash picture when the hps is off (this will help you get clearer pictures as opposed to orange pictures) they definitely look like solid dank buds though, good job!
it is true the trichomes are important to consider when determining harvest time but their are other just as important things to look at. Heres a real good explanation from fdds harvest tutorial. I still would buy a better scope so you can kind of track their development, they are like $6-$7. but if their is no possible way for you to get one its not the end of the world. anyway heres that info
"i've been trimming for 12 hours non stop so please bear with me.
we will start with ripeness. most people say to check your trichromes with 30X magnification. i have other ways. when buds are done they look "done". the appearance of the bud changes. the leaves start to hook upwards and become hard and crispy. the calyxes will swell and the hairs will turn brown. you can see a golden tinge to the bud leaves. this is the amber crystals. they start to turn amber on the leaves first.
not ready..........
ready.......
notice the difference? it's pretty easy to see once it occurs. "