Thanks for the tip with the octocoupler MorganS.
MorganS:
Power consumption is going to be an issue. Is this going to be battery-powered for long timelapses? Then it may pay to choose a different motor technology.
Later I would like to be able to draw power either from NPF style Sony batteries or a V-Mount battery because both of these battery types are used in all kinds of camera equipment anyway. But as long as I am prototyping this is not neccessary.
For reference:
Sony NPF
https://www.amazon.com/DSTE-Replacement-MVC-CD1000-DCR-VX2100E-NEX-FS700RH/dp/B00M3P9YBQ/ref=sr_1_2?ie=UTF8&qid=1512053093&sr=8-2&keywords=sony+npf
V-Mount
https://www.amazon.com/MAXOAK-12000mAh-Battery-Camera-Camcorder/dp/B00RN76282/ref=sr_1_4?s=electronics&ie=UTF8&qid=1512053138&sr=1-4&keywords=v+mount
As driver I would like to use a TMC 2100. From what I've read and seen it seems like the perfect fit.
Now I am still not sure what kind of Nema 17 to get, the regular ones or the geared ones.
I want to be able to move the slider carry up a 45 degree slope if possible. Thats something between 4 and 8 pounds of weight, that the motor will have to move.