I know this is a late reply, but a good macro/micro lens can be magical with cannabis. Add this to a real camera and your in for a treat. (any DSLR or mirrorless camera will work)...
Narrow depth of field: If your new to photography, this may make no sense, but once you use a macro you'll see what this is all about...There are pros and cons to a narrow depth of field..
1. You'll need a tripod to get crystal clear pics. With such a narrow depth of field you will be using higher F-Stops, (example F-16 -F-22) this allows more trichomes to be in field of vision. BUT it also lets in less light, so you'll need a long shutter time..
2. Tripod. A must have, holding the camera by hand and keeping it in focus will be tough at higher F -Stops....
3. Flash, you'll also need this to help light your subject up...This is optional, but has worked really well for me. I use remote flashes, one behind the plant and one facing it. This really helps to remove shadows and to show color.. (the flash will go through the plant lighting it up through stems and leaves)...
4. Turn all fans off for picture time ! Any movement will blur the pics if the shutter time is long.
Its been a while since the OP posted this, I'm wondering how things turned out.