Analog IR Photography

Discussion in 'Alternative Processes' started by Mustafa Umut Sarac, Jan 2, 2010.

  1. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    I love digital modified infrared photographs but these cameras are expensive for me. I have Canon EOS 1000 Analog.
    What do you advise for to start ? IR films are illegal here.

    Thank you ,

    Mustafa Umut Sarac

    Istanbul
     
  2. AgX

    AgX Member

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    ???
     
  3. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    terrorism
     
  4. Lukas Werth

    Lukas Werth Member

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    Try Ilford SFX 200 which is, if I recall correctly, not a "real" infrared, but only a "near-infrared" film. But I don't know whether you can get this film legally into Turkey.
     
  5. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    Can I use regular film and filters ? If I am not wrong , they are very dark , is that true ? If there is filter option and if you describe it , I will be glad. And also , there are narrow band schott filters , anyone tried this satellite technology ? Astronomers have many filters but I dont know they are suitable for example for archaeology ?
     
  6. AgX

    AgX Member

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    Mustafa you can use:

    Kodak HIE
    Kodak EIR
    Konika Infrared

    Efke IR 820
    Rollei IR
    Agfa Avipan 400S
    Rollei Superpan 200
    Rollei Retro 80S
    Ilford SFX

    ALL infrared films still have an amount of sensitivity outside their IR-range. Thus you must use filters in order not cover or spoil the IR-detection by the resting sensitivity. The less the overall IR-sensitivit of a film is in relation to the resting sensitivity the more precise (steepness and extent of cut-off of filter curve) the filtration has to be. This is especially true for the second group.
     
  7. CGross

    CGross Guest

    Hi Mustafa, of the films AgX listed, I use Efke IR 820 and Rollei IR.

    To get the typical infrared affect you will need to use a IR filter. One of the more popular filters is called a R72. I have one made by Hoya.

    Here is a link that helped me. http://www.digitaltruth.com/products/rollei_infrared.php

    There are lots of other resources if you google infrared film.

    I think your model of camera has a little window on the film door that lets you see what film is loaded. I had to put some black tape on the inside of the door of a similar camera so I didn't get fogging of the film. You may have to do the same.

    The best thing to do is get some IR film, an IR filter and start testing. There's a lot of information about where to start with your exposures (ISO selection), etc here on APUG. That should get you in the ball park but you will still need to test to determine what your optimum exposure settings will be. I bracket almost all shots.

    Good luck and keep us posted!
     
  8. 2F/2F

    2F/2F Member

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    Why the heck is IR film illegal? You say "terrorism", but what does that mean?
     
  9. tiberiustibz

    tiberiustibz Member

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    I could understand thermal cameras being illegal but this is just outside the visible wavelengths.

    The closest you can get to infrared is with deep red filters and normal film. The sky will darken, the leaves will lighten, but not to the extent of real infrared films.
     
  10. ntenny

    ntenny Member

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    Laws aren't always rationally written, of course. A law intended to restrict thermal cameras could have the side effect of making "regular" IR films illegal even though that wasn't the original point.

    But there just ain't no way to do analog IR photography without IR film. If it truly is illegal---not just thermal films, but SFX 200 and IR 820 and all the rest---then I think the OP is stuck with d*g*t*l.

    -NT
     
  11. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    I have ThorLabs catalog from Germany. 1500 pages , optic experimental gears.

    There are 2 categories interested me.

    First , EdgePass Filters , Second Colored Glass Filters.

    Catalog writes edgepass filters are good for photometry. Do photometry means remote sensing ?

    There are two subcategories for edgepass filters :
    ----------
    A - Long Pass Filters
    --------------------
    CUT ON WAVELENGHT FOR EXAMPLE 400 nm
    TRANSMISSION REGION 400 - 2200 nm
    REJECTION REGION 200 - 400 nm
    PRICE 70 DOLLARS

    B - Shortpass Filters
    --------------------
    CUTOFF WAVELENGHT FOR EXAMPLE 450 nm
    TRANSMISSION REGION 400 - 450 nm
    REJECTION REGION 450 - 585 nm
    PRICE : 70 DOLLARS

    Unlike colored filters , their cut on , cut off wavelenght will shift to shorter wavelenght when the angle of incidence increased.

    And there are colored glass filters , two subcategory , longpass and shortpass filters.

    Now let me ask , which category helps me at archaeology , surface survey and painting analysis.

    I want to take a vineyard and see the anomaly , take ground picture and see the anamoly for help to archaeologist or a painting and lots of surprises.

    Any experience ?