I don't fucks with Cannabis specific stuff anymore, it's always got that extra mark up for being Cannabis related, probably of lesser quality then general purpose stuff as well.
This goes for all markets. Learned my lesson wasting thousands on "gaming" shit.
I HAVE NO IDEA HOW GOOD THIS IS, just an idea.
http://www.amazon.ca/50-500X-Digital-Microscope-Camera-Endoscope/dp/B00DQL6W4S/ref=sr_1_5?ie=UTF8&qid=1409444704&sr=8-5&keywords=USB MICROSCOPES
But there's a tonne of em on Amazon for $30+
You will not be able to get good shots on the plant with that iphone one, I find myself using it off the casing, it's next to impossible to get it in the right spot AND not letting my plant move. Well unless you are a magician