I ran a little test outside today with my Tokina 11-16 and the Mosaic VAF-60D...nothing very fancy, but it shows a quick shot of downtown, and demonstrates the improvements you may see on fine detail in raw with the VAF-60. I put the shots on my dropbox folder:
https://www.dropbox.com/sh/eq8pqvw8pv3di6m/IzK709GYizThe two shots are not totaly identical (had to dodge some weather and hence moved about a bit, nor are they fancy. I just grabbed some quick shots in between storms. Both are done at 11mm, 2.39:1, 1600 x 670, ISO 100, and were exposed 'hot' at around F11 (in ACR I pulled them about 1.3 stops). The sun was coming and going really fast changing the conditions by over a stop, so I just depended on raw 'eating the light' and really did not worry after I took a general meter reading of foot-candle levels before I got to to the scene. I wanted to use deep focus, and a wide, as a challenge to the filter's performance. I rendered the clips as lossless AVI, and pulled these stills from the Premier screen.
You may or may not agree but I see much more fine pattern noise in the details of the image without the VAF-60. There is still a tiny bit in the image with the filter, but only in a few diagonal fine features (railings). Overall I am reasonably convinced that the VAF-60D does help reduce image artifacts in raw, but not as well as it controls them in H264. I personally believe this is due to the raw file having more acuity and hence more artifacts are visible that would be lost to the processing done to the H264 image. I would suggest that for most subjects that could have issues with moire or aliasing due to fine line or pattern detail,it is useful to put the filter in place if you own it. I expect to just leave it in place, as I don't do still work on that camera.
Of course others may not agree, and your mileage may vary...:-). Of course controlling depth of field with wider stops (and ND) or longer lenses is also going to help, this was intended as a test with no other mitigating steps.
At this point, I am pretty satisfied that the filter does help, does not perform quite as well in raw as in H264 for what I expect are several reasons, and I really am not sure there is a lot more to say about it...I expect it is not a purchase everyone will want or feel the need to consider, but for those of us that are motivated to address the issue of aliasing and moire, are looking for an optical solution (not just technique or software), and have the funds, I think (just my opinion) the VAF-60 is a nice option.