Originally posted by IgorZ Nice photo! I had to check out firecrest filters. Interestingly, they only have 13 and 16 stop filters, and say that the 16 stop filters are most popular for long exposures. The guy who runs breakthrough photography argues that the most useful nd filter is a 6 stop filter...
Thank you very much Igor, I am glad you enjoyed the photo. About the Formatt-Hitech filters, they have them in every intensity, not just 13 and 16 stops: see here for the filters from 1 to 10 stops
Formatt-Hitech Firecrest ND Filters. The main difference between FH and every other glass filters manufacturer is that the FH glass filters are bonded, not coated, meaning that the darkening coating is sandwiched between two thin layers of glass rather than applied over the glass like every other manufacturer does: bonding preserves the filters longer, preventing the scratching on the coating that quickly makes other glass filters less useful (if not totally unuseful). In my experience, I use 3, 6, 10 and 13 stops, and the most used are the 6 and 10 stoppers, followed by the 3 and the 13 last. Even though, for daytime long exposures, the 13 is fundamental, so it depends on what you shoot most. Perhaps you might be interested in my article on filters, with a scientific comparison on neutrality:
BEST FILTERS FOR LANDSCAPE PHOTOGRAPHY REVIEW
Hope this helps, best regards
Vieri