[ftge544New Member Join Date: Jun 2012 Posts: 2 Offline]

I used the Kenko NDX Variable ND filter on our New England Fall Foliage workshop with excellent results. Check out this thread for a few images.

[ftge544New Member Join Date: Jun 2012 Posts: 2 Offline]

[ftge544New Member Join Date: Jun 2012 Posts: 2 Offline]

Everyone who was on the New England Fall trip with David worked with ND and variable ND. They were so valuable, every one bought into David's system. I suspect he will be answering you too. But from a user perspective there was no vignetting issue with the 35 using screw in polarizing and ND filters. We also used David's “external” system for ND and variable ND, with no vignetting and which can be viewed anywhere

[ftge544New Member Join Date: Jun 2012 Posts: 2 Offline]