6 Stop ND Filter Suggestion?

[david choo]

<p>Hey everybody.<br>

I have been looking for a 6 stop ND filter in 82mm and 77mm. Found the 77mm version in B+W but can't seem to find it in 82mm.<br>

I also am considering a 4x4 version for my Lee Filter Holder but am curious if anyone has any experience with a 6 stop ND filter in that size. I require maximum resolution and am hoping there is a high quality glass filter that will fit my needs.<br>

Definitely don't want to nor can I double stack filters. Vignette issues. <br>

Any suggestions? :)<br>

Thanks!</p>

[david choo]

<p>Really prefer circular screw in filter! :) </p>

[guido_h]

B+W does not make the #106 filter in 82mm size. Kenko, Tiffen, Heliopan don't either.

 

Maybe check some of the links mentioned in this thread:

 

http://www.photo.net/canon-eos-digital-camera-forum/00KEtf

[Alan Marcus]

<p >The Kodak Wratten Neutral Density Filter No. 96 is a series available in 75mm square size un-mounted. These are made of gelatin sheets and lacquered, for protection. They are optical flats, suitable for mounting directly in front or behind or inside the lens. They meet ANSI PH2.19-1976 and are stackable without encountering serious optical factors. </p>

<p > </p>

<p >They are available in the following densities 0.1 – 0.2 – 0.3 – 0.4 – 0.5 – 0.6 – 0.7 – 0.8 – 0.9 – 1.0 – 2.0 – 3.0 – 4.0. </p>

<p > </p>

<p >The density notation is log base 10. Thus the numbers above are the exponent. Thus 10 elevated to the exonet 0.3 = 2 this is the Filter Factor = 1 f/stop. </p>

<p > </p>

<p >Table of density to f/stop attenuation and Filter Factor</p>

<p > </p>

<p >0.1 = 1/3 f/stop = FF 1.25</p>

<p >0.2 = 2/3 f/stop = FF 1.6</p>

<p >0.3 = 1 f/stop = FF 2</p>

<p >0.6 = 2 f/stop = FF 4</p>

<p >0.9 = 3 f/stop = FF 8</p>

<p >1.0 = 1 1/3 f/stop = FF 10</p>

<p >1.0 stacked with 0.2 = 1.2 = 4 f/stop = FF 16</p>

<p >1.0 stacked with 0.5 = 1.5 = 5 f/stop = FF 32</p>

<p >1.0 stacked with 0.8 = 1.8 = 6 f/stop = FF 64</p>

<p >2.0 = 6 2/3 f/stop = FF 100</p>

[monika_epsefass]

<p>Doesn't Singh-Ray do these things? You might want to check out their website. They do customized versions of everything they do. The bittersweet touch about them is the price, just.</p>

[david choo]

<p>Found out B+W will do an 82mm in 6 stop. It's a custom order that takes a week or two.</p>