I found with a 100x scope, it is very difficult to focus in on the plant material. It also seems that if it is not perfectly still and on a stable surface, it made it even more difficult to focus. I have a 30x loupe and it works well! Its not perfect by any means, but does the job well. It takes a bit getting used to and make sure you have plenty of light when you are checking your trichs!
and what is it exactly I am looking for to signify when the plant has surpassed it's peak growing efficiency period?
t33to, skip the Radio Shack scope. It is a pain in the ass to use, though it was my only instrument for years I have always hated it. Way to hard to get a good view while trying to work the focus wheel.
Go for a jewlers loop for a start. I found a 40x loop on ebay for less than $5 shipped. Check the location of the vendor and it will give you an idea of how long it is going to take to arrive. ( I live on East Coast so anything from NY to FL will arrive in 3 days max from day shipped).
Be careful going for ambertrichs , it is easy to let them go too long and the THC begins to degrade. If you want couchlock, try around 20-30% amber. But, you are actually better off picking a strain that is known for its couchlock high vs letting a sativa go till its is mostly amber. It kind of defeats the purpose of growing out a sativa to begin with.
PhatPhreddy420, nice find on the 60x loop (I had to go order one already ). The little 40x I recently got works pretty well, and as Millhouse says you just have to get use to it. But, 60x would be a bit easier to work with I believe. I have tried the 100x scopes and they are just to strong for this particular purpose.
By the way, do you have a link or web addy for the IPhone adapter for this thing? Thanks.
t33to, good luck with your harvest and I hope you get the couchlock you are after.
Radio Shack $10 lighted pocket microscope.
I got one from radioshack, it was like 10-15 bucks, 60x-100x zoom with focus and led light. Works great for me..ill try to find a link
Edit: http://www.radioshack.com/product/index.jsp?productId=2179604
Thats the one i got, dont have to get it sturdy or balanced either since it stands nice and flat on a table. Just snip off a bud leaf and put it under there