Here's the first posting from the New York CIty workshop/photowalk that we did in November 2012.
Some notes: I've been using the brand new Hitech IRND Prostop2 filters generously provided by Hitech Format. For now I can say that I've definitely put aside my trusty B+W ND filters and will be using the Hitech IRND filters only: they're simply very neutral and they come as screw on and rectangular filters. As you know I'm very critical in my selection of filters, this is something I can really recommend.
These filters will become available first at Amazon and B&H in the weeks to come.
Thanks Rod Clark!
2 x Hitech IRND "Prostop 2 - totaling 16 stops
316s (5m16sec) exposure
PS CS6 - Silver Efex Pro 2