Thanks Laurie, right now I'm just shooting between 1.5 to 2.5:1 and you're right, it IS challenging.
Once I got used to 5:1, then I'll think about getting an extension and go follow you guys into the realm of 10+ magnification.
BTW, what specimen have you used your 15:1 magnification on?
Images taken in a controlled environment or with a posed subject. All subject types.