I just acquired a dedicated macro lens for my dslr, the Tokina 100mm f2.8.
I've been playing with it for awhile now but still kinda confused. haha.
1. Why does the max aperture change when i focus the camera? isnt it supposed to be a constant f2.8?
2. At mag ratio 1:1, why is the max aperture f5.6? is this normal?
3. How would you use a macro lens? any specific steps?