Thank you very much everyone, your comments are all much appreciated indeed, I am glad you enjoyed it
@ maddogmurph: this is actually a single exposure at f/22. I don't know where you are based, but if you are looking for a 645z the very one I used to take this photograph is still available here:
Pentax 645z, no connection with the linked shop except being a very happy customer of theirs for many years now, the guys are great and their service is great.