Looking forward to your report.I'm in agreement with Paul regarding the limitations of FA. But then stoppers also have limitations which would be very similar to FA. I am very much aware of the ability of FA to decrease noise but for my shooting requirements this feature/benefit is of little use.
I'll be shooting the Oregon Coast with both my 4150 and 100s and will have the time to compare FA vs. Stoppers to see if there is any pronounced visual difference. As far as shooting a single exposure vs. two shot for shadow recovery that will simply depend on which camera I am using. If I am shooting with my 4150 then it's simple to shoot with the dual shot feature but so far I am convinced that any differences are subtle. I'll try to shoot examples of both while on the Coast.
Victor B.
None of my MF cameras support FA, but my m43 camera does. Of course, the noise in the shadows is much more prominent with the smaller sensor than with an MF sensor. 16 shots FA makes a huge difference on m43 but may not help much the already excellent Phase One shadow noise.
I do not know how Phase One handles noise during long exposures (sensor heating). Some cameras require LENR for long exposures, but with FA, LENR is not needed.