MT Shooter wrote:
Simple fact that it can NOT fit flush against the lens. The lens has a built on "Tulip" lens hood. It is longer at the top and bottom due to the aspect ratio of the sensor. Yet it is shorter on the sides, this means there is a BIG gap for the light to come in when you rotate the camera to portrait mode. Don't believe me, that's fine. Just mount it up and look at it, pretty plain to see the issue for anyone who has used one of these filters on that lens. And yes, I have.
I don't disagree with you, in fact in my OP I stated what I thought the issue was. You just confirmed my thoughts. All I'm saying is I think the SW150 is a bad design, and I am totally happy with my 100mm Lee setup.
After a little more research I see Lee came out with a light blocker that can adapt to that filter, although the reviews are less than stellar. It still does not totally fix the issue it's undoubtedly better than not having it. Too bad I did not have this before I left on the trip.