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Thread: Efke Infra red questions

  1. #11
    stradibarrius stradibarrius's Avatar
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    Re: Efke Infra red questions

    Because I have shot so many different formats I decided the Cokin filters were the best way to go. Just buy the different adapter rings and you can you the same filters on any lens. The Cokin 89B is what I use too.

  2. #12

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    Re: Efke Infra red questions

    Quote Originally Posted by stradibarrius View Post
    Because I have shot so many different formats I decided the Cokin filters were the best way to go. Just buy the different adapter rings and you can you the same filters on any lens. The Cokin 89B is what I use too.
    Quote Originally Posted by vinny View Post
    If you use a lee hood, get a cokin 89b (lee size), otherwise bite the bullet. There's a guy selling infrared filters for lee holders on ebay advertised as 89b, they are not. Completely opaque and the first one he sent me didn't fit. Try looking for 82mm glass filters! That's my $tandard $ize and you can forget a name brand ir filter.
    I have a lee 100x100 (4inx4in) kit including a bellows. Do you have to worry about stray light getting behind the filter? I would prefer to go this route so I can use various lenses. I haven't seen the 89b sold for Lee yet, I guess I will have to look harder. Thanks!

  3. #13
    stradibarrius stradibarrius's Avatar
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    Re: Efke Infra red questions

    I have never had a problem. The 89b fits tightly in the holder.

  4. #14

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    Re: Efke Infra red questions

    Cokin doesn't call it an 89b, it's a 007.

  5. #15
    Drew Saunders drew.saunders's Avatar
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    Re: Efke Infra red questions

    Quote Originally Posted by John Brady View Post
    I have a lee 100x100 (4inx4in) kit including a bellows. Do you have to worry about stray light getting behind the filter? I would prefer to go this route so I can use various lenses. I haven't seen the 89b sold for Lee yet, I guess I will have to look harder. Thanks!
    That's what I use, and I've never had problems with light behind the filter. I have the wide angle hood with 2 slots, and I use the slot nearest the lens. The Lee IR filter comes as just a plain piece of polyester, so you have to buy the mount, cut it and fit it to the holder (which is a bother, I'd pay more for it to be pre-loaded)

    Filter: http://www.leefiltersusa.com/camera/...4757E77C05DCB/

    Mounts (10/pack): http://www.leefiltersusa.com/camera/...47BE96B4E501C/


    The gel-snap works with the IR filter too, but you have to be more careful about making sure you cover the lens completely. I've had light leaks with the snap holder:

    http://www.leefiltersusa.com/camera/...475679C8606E3/

    Drew
    Flickriver (to avoid Flickr's annoying new format): http://http://www.flickriver.com/photos/drew_saunders/

  6. #16
    よろしくお願いします! Andrew O'Neill's Avatar
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    Re: Efke Infra red questions

    John, who is the seller on ebay? By the way, I always use an opaque filter (kodak 87) and EI 1.5.

  7. #17

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    Re: Efke Infra red questions

    Quote Originally Posted by Andrew O'Neill View Post
    John, who is the seller on ebay? By the way, I always use an opaque filter (kodak 87) and EI 1.5.
    This is the person and listing I bought from.

    http://www.ebay.com/itm/110761786780...9#ht_500wt_922

    I haven't used any of the film so I can't vouch for it.

  8. #18
    よろしくお願いします! Andrew O'Neill's Avatar
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    Re: Efke Infra red questions

    Thanks John. I snagged a box. Too good to pass up.

  9. #19
    Maris Rusis's Avatar
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    Re: Efke Infra red questions

    I've just finished testing my batch of Efke IR820 8x10 format sheet film that I got from Ebay last year. My film 'fridge runs at 4 Celcius and the film has been in there about 6 months. The film may be showing its age with the sensitising dye for infrared response degrading and the overall sensitivity diminishing. Here are some results:

    Exposed as a normal panchromatic film, no filter: effective EI = 8.
    Exposed behind a #25 red filter: effective EI = 1
    Exposed behind a IR680 or IR720 filter: effective EI = 0.15

    Development was 11 minutes@ 20 Celcius in Xtol.

    The negatives show no overall fog but contrast is low. Perhaps this is consistent with an aging emulsion. Contrast boosting experiments continue.

    In spite of the lower than expected sensitivities I'm going to shoot this intriguing and inexpensive film ($75 a box of 50) and see what wonders will emerge.

    Curiously, the Efke IR820 emulsion on my 120 format and 4x5 format films seems good and delivers a consistent EI = 1.5 (behind IR680 and IR720 filters) and these films have been in my 'fridge for more than a year.
    Photography:first utterance. Sir John Herschel, 14 March 1839 at the Royal Society. "...Photography or the application of the Chemical rays of light to the purpose of pictorial representation,..".

  10. #20
    Cor's Avatar
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    Re: Efke Infra red questions

    Maris,

    I have been shooting relabeled EFKE (MACO) for years now, I keep my film stock at -20degC, and a box "ready to (almost) go" at 4deg C, as well as a couple of loaded holders at room temperature. Haven't seen a loss of contrast (and it has heaps of it) nor increase of fog, my oldest batch must be more than 5 years old


    I too end up at 1-1.5 Asa with a 70 red filter.

    Best,

    Cor

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