ND Grad Filter?

Discussion in 'Beyond the Basics' started by will-jum, May 2, 2008.

  1. will-jum

    will-jum TPF Noob!

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    Hi, Im looking into getting a Cokin ND8 soft filter + holder etc.

    I wanted to know if the p-series (http://www.cokin.com/ico15/ico15-haut.html) is suitable for wide angle (i'm talking 10-20mm) as i heard you may need a bigger better series to get any kind of results? I also heard something about vignetting, if the filter is too small...?

    Any help would be great!
     
  2. Arch

    Arch Damn You! Staff Member Supporting Member

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    yea you need the wide angle filter holder... as shown on the right on this page.. then you need the right size adapter ring (probably 77mm?)....

    http://www.hiltonphoto.co.uk/products/cokin_p_series_filters_1.html


    The normal size holder isn't wide enough for the 10-20 and you'll not only get vignetting but also half the holder will be in view!

    Btw, if you are in England then Hilton Photographic are a great place to buy.
     
  3. Steph

    Steph No longer a newbie, moving up!

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    As Arch said the P-size filters are too small. Moreover, I used ND grad Cokin filters and they are not exactly neutral and sometimes give a purple cast to grey skies. You'll need to use 100mmm wide filters (or bigger) either from Cokin, Lee or Hitech, with the appropriate holder. In the UK you can buy Lee and Hitech filters from TeamWorkPhoto.
     
  4. skiboarder72

    skiboarder72 No longer a newbie, moving up!

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    I use the cokin P on my 10-20mm, works great past 13mm, I just have the normal holder (3 filters) but if I chop off the sides (extra 2 filter slots) then it will let me go wider without viginetting
     
  5. will-jum

    will-jum TPF Noob!

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    Am i right in saying the p series is fine for the 10-20mm sigma lens, if i buy the wide angle filter holder?

    Also, can i ask what the difference between ND8 and ND8x? And arch i understand you used a ND8 Filter for the shots of the lake district (http://www.thephotoforum.com/forum/showthread.php?t=120575), was this just the strait ND8 or ND8x full/ soft?
     
  6. Arch

    Arch Damn You! Staff Member Supporting Member

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    Yep the wideangle holder as shown on that site i linked is usable with the 10-20mm, with just a little vignetting (but thankfully no holder in shot!).

    Im not sure about the 'x' ones to be honest, but yes i used the ND8 soft filter for those shots in the Lake district.
    As Steph mentioned tho, the Cokin's can cause a purple cast to the sky area, this is fixable in PP tho and on occassion i have actually left a bit of purple in the sky just for added drama. ;)
     

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