Took three pictures for a test the first day camping. Filter is noticeably not as dark as my other polarizer filters. It appears from my non-scientific, seat of the pants three photos, there is a one-third stop difference between filters.
All photos were revised from 300 resolution to 96 and saved for internet/web via Photoshop. That's it!
Being a polarizer filter, the adjustment, in my case, may not be 100 percent exact, but they look the same.
All photos taken with a Nikon D700, with a NIKKOR AF-S 24-70 F/2.8G EDIF ZOOM, set to 24mm with ISO locked at 200; shooting in aperture priority. Lens was aimed at 208.13 degrees (SSW).
At 24mm, this filter always gives a slight vignetting on the corners as shown.
This photo is from a standard type Hoya Polarizer. Standard in light transmission as with all other polzarizers, and also standard in depth of the filter ring.
Shutter speed: 1/60s
Photo taken with new style Hoya Filter. No vignetting.
Shutter speed: 1/80s
Photo taken with new Hoya Filter.
Shutter speed 1/60s
The sky in the first photo is a bit darker then in the other two photos. However, the glare from the water, and there was a lot of glare since the sun was just over my left shoulder, was cancelled by both filters equally.
Didn't test on the strength of the glass and hopefully, don't plan on that type of test anytime in the near future.
And, the lens cap does fit, but since the lip area of the filter is smaller than compared to a normal size filter, you have to be careful in placing it on the filter (make sure it is locked in place).