Well today was dull enough for an outdoor experiment with the IR attatchment on the Metz. So a Cokin IR filter on the Metz, and a Hoya R72 on the lens.
The composite shows the visible light version in comparison with the IR flash version. I tried direct and diffused flash. Adding a diffuser produced a rather soft image and also showed that I should really have bought a Metz CT60 all those years ago

. Never enough power when I want it

. Light loss through the diffuser really required ISO to be ramped up to 1600. Not a good plot on the D100 as I think of NR as a detail killer, so never use it.
Fairly pleased with the experiment but it also put a thought in my head that I should try my Multiblitz studio job, as the flash duration is a lot longer and that may boost the IR effect.
For the gallery pic I which is a crop of the IR version here, I added a bit of tint and then boosted the whole effect with curves. Sort of Autumn rose.
To save going back to the gallery to compare, I have put it in this post.
Don