Thank you, I was pretty pleased when I spotted it, obviously looked nothing like the processed image, but it was caught in a web just blowing in the wind in my garden.
Out of curiosity, what size tube(s) did you use? I have an 11mm and 18mm that I like using with the 15-35mm for extreme close ups.
Adam Gibbs posted recently on YouTube regarding close-up filters and extension tubes. I once had the cheap screw-on filters for my SLR, fun to play with but nothing epic came of it.