We were using a Tiffen 82mm Sky 1A filter on our F355 with the Fujinon HS 18X5.5 BERM. We're seeing the filter edges in the corners of the frame on extreme wide shots. If anyone else is using this lens, are you having this problem? If not, which filter(s) are you using? At this time we're mainly concerned with a clear/Sky 1A filter primarily to protect the front lens element.

Tim,

I had the same problem with my Fuji 17X5.5 so I bought a THIN Schneider filter and solved the problem. The thinner filter ring gets rid of the vignetting on the corners.

Just to second Rick's statement. Tim, you have to use the low profile filter rings to avoid vignetting on wide shots. I have the same lens that you have. I have Hoya low profile UV filters and they are no problem at full wide.

-gb-