Thanks Sil and Glen for your thoughtful replies. You make some good points.
I have been really enjoying the business of learning to navigate my way around the night sky and, along the way, getting a feel for where an interest in astronomy might take me.
So far, it seems likely that I won't get into the sort of deep space astrophotography that you see examples of elsewhere on this forum. My interest in photographing the sky is more along the lines of general photography that happens to have stars in it.
But I have enjoyed testing out the photographic gear that I already own to see what can be done with it.
Cheers,
Chris