REGULAR VS SLIM Thickness Neutral Density Filter?

happy2010

Dear respected Dgrinners,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
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REGULAR VS SLIM Thickness Neutral Density Filter?<o:p></o:p>
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My purchase considerations, wondering which will ideally…<o:p></o:p>
1) Avoid potential vignette<o:p></o:p>
(To avoid the edges of the filter encroaching on the Field of View; perhaps not a problem at large apertures with shallow DoF, but read could be at small apertures with large DoF)<o:p></o:p>
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2) Enable a regular/standard Canon lens cap to be utilized, (instead of those inconvenient/frustrating alternative after market lens caps that some slim/thin filters require & which almost always fall off the lens!).<o:p></o:p>
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Regular thickness:<o:p></o:p>
B+W 72mm #102 Neutral Density (ND) 0.6 Multi-Resistant Coated (MRC) Glass Filter <o:p></o:p>
http://www.bhphotovideo.com/c/product/120456-REG/B_W_66011363_72mm_102_Neutral.html<o:p></o:p>
B+W 77mm #102 Neutral Density (ND) 0.6 Multi-Resistant Coated (MRC) Glass Filter <o:p></o:p>
http://www.bhphotovideo.com/c/product/120457-REG/B_W_66_045084_77mm_102_Neutral.html<o:p></o:p>
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VS<o:p></o:p>
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Slim thickness:<o:p></o:p>
B+W 72mm #102 Neutral Density (ND) 0.6 Multi-Resistant Coated (MRC) Slim Glass Filter <o:p></o:p>
http://www.bhphotovideo.com/c/product/235870-REG/B_W_BW102MCS72_72mm_102_Neutral_Density.html<o:p></o:p>
B+W 77mm #102 Neutral Density (ND) 0.6 Multi-Resistant Coated (MRC) Slim Glass Filter <o:p></o:p>
http://www.bhphotovideo.com/c/product/235871-REG/B_W_BW102MCS77_77mm_102_Neutral_Density.html<o:p></o:p>
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Scenario/Application: - outdoor portraits of people (single or couple, head/shoulder, half or full body shots).<o:p></o:p>
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-CAMERA/LENSES combinations <o:p></o:p>
Canon 1DmkIII with Canon 85f1.2, 50f1.2, 24-70f2.8 and 70-200f2.8 [all lenses with existing B&W 010 F-Pro UV Haze MRC filters]<o:p></o:p>
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Canon 5DmkII with Canon 85f1.2, 50f1.2, 24-70f2.8 and 70-200f2.8 [all lenses with existing B&W 010 F-Pro UV Haze MRC filters]<o:p></o:p>
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Thank you for any help or experience with this B&W product or products in this area, as I am just exploring the creative aspect of utilizing neutral density filters.<o:p></o:p>
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Mary<o:p></o:p>

Manfr3d

hi Mary,

regular thickness will be just fine with the lenses you mentioned.
(and more useful because regular filters allow to mount the lenscaps
on them, slim ones don't). Slim filters become more interesting with
ultra wide angle lenses where you don't wan't corner darkening due
to a filter that is too thick.

Beware though that only the 1 to 3 stops nd filters are color neutral
and that a 6 or 10 stops filter will render your images somewhat
warmer.

Personally I use a 2-stop (or "0.6") mrc nd filter from B&W on my 50mm 1.0 and it allows
me to shoot wide open in the sun (at ISO 50 to 100 and 1/4000s). I think this is the kind
you will find most useful especially on your 85mm 1.2. I bought it in 77mm with a stepdown
ring to 72mm so that I can use the filter also on my 70-200 2.8.

happy2010

Dear Manfr3d,
-Thank you for taking the time to reply and for your helpful information, your comments will help guide me.
-Also for the info about ultra wide lenses, as I found that out with my Canon 16-35.
-Step down ring an interesting concept.
Thank you again.
Mary