Check this out form Singh-Ray!

[Trevor Ash]

http://www.singh-ray.com/varix.html

They have a new variable density filter. You simply roate the front element (like a polarizer) and it adjusts density from 1.5 to 10 stops. Pretty neat if it works well!!!

[Kokopeli]

http://www.singh-ray.com/varix.html

They have a new variable density filter. You simply roate the front element (like a polarizer) and it adjusts density from 1.5 to 10 stops. Pretty neat if it works well!!!

340 bucks is pretty hefty if you as me, but what a great idea it is!

Thanks for bringing this one to our attention!

[Sebastian]

Fancy name for two stacked polarizers, one of which you can rotate.

I can't believe I never thought of that. I can just get another Hoya CP like the one I have and stack them to chieve the same results.

Interesting...

[another view]

So that's how they do it! I think I'll wait until you guys buy one and test it out first.