Thread: Filming in the desert - which IRND ?

Page 1 of 3 123 LastLast
Results 1 to 10 of 26
  1. #1 Filming in the desert - which IRND ? 
    Member tetsujin28's Avatar
    Join Date
    Sep 2013
    Location
    Paris - Barcelona - Tokyo
    Posts
    51
    In April I'm in the desert of Almeria to film a music video.
    Currently I have 4 IRND filters (0.3, 0.6, 0.9, 1.2) of the Tiffen brand.

    I was told that the brightness of this place was extreme.
    I would like to have your opinion on additional filters that I should have.
    I don't what to expect there, so I will also gladly take any kind of advice on filming in the desert.

    Thank you

    trwW0SjHq0FQBamXNjRAUxxLxKEGiLcog2D8178orpg.jpg

    Photo taked by my spanish assistant in place
    Reply With Quote  
     

  2. #2  
    Junior Member
    Join Date
    Feb 2014
    Posts
    24
    Fist thing, ditch the tiffens and get Hoya. My tiffens have a very slight green shift. It may be a different situation if you have water whites. 4 stops seems like it may be enough though for the high end.
    Reply With Quote  
     

  3. #3  
    Taking a Vacation
    Join Date
    May 2013
    Location
    Los Angeles
    Posts
    4,632
    Yeah, if you're going for a paid project, trash the Tiffens man. Well, sell em to fund the Hoyas. You're going to need at least 1.8 in the desert as well. You can stack the Hoyas, doing that with the Tiffens would scare the crap out of me. If you haven't done any research, you need to search the threads here for Hoyas and Tiffens. I have a whole thread with the Tiffens and how wrong they are for the camera.

    Maybe a Cir Polarizer as well.
    Reply With Quote  
     

  4. #4  
    Senior Member
    Join Date
    Sep 2012
    Posts
    1,989
    Vic is right on, at least 6 stops. According to sunny 16 you'd need 8 stops of nd to shoot f4 at 800 iso, 6 stops would yield an f8. The tiffens are probably fine as long as there is nothing black in the shot, insert humor emoticon here.
    Reply With Quote  
     

  5. #5  
    Senior Member CaptainHook's Avatar
    Join Date
    Aug 2012
    Location
    Melbourne, Australia
    Posts
    2,186
    Yep, check out my comparisons of the new Hoyas to the Tiffen IRND's here:

    Pocket Cam - http://www.bmcuser.com/showthread.ph...ll=1#post97497
    4K Camera - http://www.bmcuser.com/showthread.ph...l=1#post108645

    I feel a little "dirty" posting this, but i have had some 'success' working on a LUT to help with IR contamination on the BMDcams.

    Here's a frame with the Tiffen 1.2 4x4 ND with NO IR cut filtration:



    And here's the same image with my IR Cut LUT before all other nodes:



    Not perfect i know and it's just the start and will be a work in progress, but still a much better place to start a grade.

    It's in my 'donators pack' (hence the reason i feel dirty mentioning it) from here:

    http://www.bmcuser.com/showthread.ph...BMDFilm-Extras
    Blackmagic Design
    My BMD LUTs.

    **Any post by me prior to Aug 2014 was before i started working for Blackmagic**
    Reply With Quote  
     

  6. #6  
    Member tetsujin28's Avatar
    Join Date
    Sep 2013
    Location
    Paris - Barcelona - Tokyo
    Posts
    51
    Hoya looks interresting but I am working with 4x4 filters and 4x6.5, and as I remember Hoya doesn't make square filters, is it ?

    I went square filters because I have a wide variety of zoom and primes and I thought it was complicated to have multiples on lenses filters with multiples diameters and values, I am also a big fan of filters on cam like pro mist ...

    Anyway if I understand well I have to go with something stronger 1.8 or 2.1 (6 or 7 stops down) with a circular polarizer, many of lenses have a sweet spot at around F5 so it could be okay.
    Last edited by tetsujin28; 03-04-2014 at 10:46 AM.
    Reply With Quote  
     

  7. #7  
    Taking a Vacation
    Join Date
    May 2013
    Location
    Los Angeles
    Posts
    4,632
    Quote Originally Posted by tetsujin28 View Post
    Hoya looks interresting but I am working with 4x4 filters and 4x6.5, and as I remember Hoya doesn't make square filters, is it ?
    Ahhh, yep. Is it possible to use a 77mm ir cut filter on your lenses, like a standard uv filter one? Maybe a TrueND IR cut filter. If not, shoot raw and get that LUT from hook cause you're going to need it! That 2.1 IRND Tiffen is the worst filter I've ever seen. Not sure if you can rescue anything from it.
    Reply With Quote  
     

  8. #8  
    Member tetsujin28's Avatar
    Join Date
    Sep 2013
    Location
    Paris - Barcelona - Tokyo
    Posts
    51
    @CaptainHook
    Your post is very interresting because I saw with IRND filters and in some circumstances there is always and IR color shift that need to be corrected.
    Reply With Quote  
     

  9. #9  
    Member tetsujin28's Avatar
    Join Date
    Sep 2013
    Location
    Paris - Barcelona - Tokyo
    Posts
    51
    Quote Originally Posted by vicharris View Post
    Ahhh, yep. Is it possible to use a 77mm ir cut filter on your lenses, like a standard uv filter one? Maybe a TrueND IR cut filter. If not, shoot raw and get that LUT from hook cause you're going to need it! That 2.1 IRND Tiffen is the worst filter I've ever seen. Not sure if you can rescue anything from it.
    Yes I only work with raw files and that was the main reason of buying a BMCC

    Maybe If I buy a Schneider IR filter at 680 nanometers and some choosen hoya ND on lenses or Schneider square ND it could work well, anybody test that sort of configuration ?

    By the way CaptainHook
    your work and "donations" are greatly appreciate in the BMCC community, i am glad that you are here and same for the others cinematographers here
    Last edited by tetsujin28; 03-04-2014 at 11:04 AM.
    Reply With Quote  
     

  10. #10  
    Member tetsujin28's Avatar
    Join Date
    Sep 2013
    Location
    Paris - Barcelona - Tokyo
    Posts
    51
    @VicHarris
    The Tiffen IRND you tested are the hot mirrors (dichroic) or the newer full spectrum ?
    Both technolgies are different.

    I read on the internet that the HM have a noticeable magenta cyan color shift and the full spectrum are really better.
    I also remember the Abelcine test where they test the full spectrum if I remember well.
    Last edited by tetsujin28; 03-04-2014 at 12:05 PM.
    Reply With Quote  
     

Tags for this Thread

View Tag Cloud

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •