Quote Originally Posted by xkaes View Post
Given the prices they charge for their ND filters, you deserve an accurate filter, as well as a free night at a luxury hotel.

Your test methods leave a lot to be desired but since I don't know your gear, all I can suggest is to put your camera on a steady support. Then meter a blank, midtone scene, such as a gray card or evenly illuminated wall -- with and without the ND filters. Hopefully your camera gives you some sort of f-stop and shutter speed readout that you can compare. Without that, I'm afraid you are just using your eyeball -- not too accurate.
Haha, yes. They are pricey and only one of the reasons I can't afford to stay in a luxury hotel.

Thanks for the tip. I'll try this method next and see what comes of it. And yes, my eyeballs have a lot to be desired.