I posted this because the technique was explained pretty well - along with some pretty nice example images. Yes, as laid out - it appears to be gear heavy, but making adjustments for what we have available should render some reasonably acceptable results. Obviously the K5 rather than a FF D800. The K5 has some of its own advantages as has been pointed out. Swapping Pentax available glass for the Nikon 14-24/f2.8 is going to be a challenge - but again, you go with what you have available, make adjustments and work through the problems. Yes, the Nikon lens is probably the best available - but photography is always going to be a set of compromises. I am thinking of taking my widest (10-17, 8-16 and 12-24) along with my fastest (31Ltd/1.8 and CZ 28/f2.8) then go looking for some views that would match the glass. There are settings that may compose to the narrower glass. For the wider glass, some open skies and let the settings align with the apertures I have - and then just work with it
I do admit that capturing a very interesting night sky is going to be a bit of a challenge - but a fun time will be had by all....