Thank you marjanko!
I have a Nikon D7000.
But the question you want to ask, is "what lens" do I use.
And for that, it's several answers:

For some pics, I work with my regular gear for field photography:
Nikon D7000 + 2x teleconverter + Nikkor 60mm micro (sometimes I add extension tubes).

For the stacks:
Nikon D7000 + Nikon Bellows PB-5 + Either my Nikkor 60mm micro, or a m-plan microscope objective (mostly a 10x).

Like I mention in my post, I'll be happy to write several tutorials, just need some help to fund them :)