An old article I wrote in 2011 about all of this

Well a 50x60 inch print would need a sensor of 15’000 x 18’000 pixels if you want to print with 300ppi. That’s still 270 megapixels or about 68 megapixels, if you allow yourself two times digital enlargement.

Go ahead and get a 100 megapixel Fuji GFX camera and you’re there…and then you need a decent lens too, specially if you want to zoom in to 1:1…plus some extension rings if necessary. All of it should be possible within a budget of 10’000.-

I’m building a relatively low cost rig that should be able to deliver stability for the weight.
Check it out here: