Thanks Tom. Is that a Pentax 600mm? A rare beast indeed. BTW, have you set up the lens permanently on that post?

Which 600mm lens did you use?

I like the way the tone emphasises the soldity of the steelwork, it is very effective. I think I might have cropped the top to lose the partial slot as it acts against the symmetry. How big is the castellated nut? it looks enormous.

I like the way you haven't corrected the white balance and left the blue, to give it that ethereal feel. Agree with the all above comments, and ethereal is the right word. So Graham, is the blue 'natural'or enhanced?