Infrared filters?

Discussion in 'Miscellaneous Equipment' started by tiberiustibz, May 1, 2009.

  1. tiberiustibz

    tiberiustibz Member

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    So I'm looking to try infrared photography with the school's 4x5 monorail camera and Efke IR820. I'm looking for a good filter to achieve an intense infrared effect. The only problem is that the cheapest one I can find costs $70-300 for an opaque sheet of plastic. Am I going to have to bite that bullet or is there another option? I've been looking at the wratten 87 or 88A and I can't believe how expensive a small sheet of plastic can be.
     
  2. MarkL

    MarkL Member

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    I have a 88A and 89B Hitech filters. I believe they have a frequency cutoff of 770 and 700 respectively. Can't remember what I paid for them, but they do work well. A plain red filter won't do much for the IR820.
     
  3. Rob Skeoch

    Rob Skeoch Advertiser Advertiser

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    I use the B+W IR filters... I think they're called 092's and are very dark red... much darker than my red filter. You need alot of light with these on... maybe around ISO 1. The filters are pricey.... what size do you need?
    -rob
     
  4. tiberiustibz

    tiberiustibz Member

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    Why do they cost so much? The lens is pretty large in diameter, I'm not sure exactly, but I was planning on getting a 3x3 plastic one and using that.
     
  5. Andrew O'Neill

    Andrew O'Neill Subscriber

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    #87B is an opaque IR filter. I use it on Efke IR 4x5. You have to expose it at about EI 1.5.....yes, 1.5. So, on a sunny day, I get exposures at f/11@ 21 seconds (including reciprocity). Developed in Xtol stock for 14 to 16 minutes (20 C). Make sure you shoot backups.
     
  6. skyrick

    skyrick Member

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    ?????

    I bought a brand new Hoya 720nm IR filter on eBay for $29.95. Not sure what the difference is between it and a $70.00-300.00 filter would be.

    Rick
     
  7. nicefor88

    nicefor88 Member

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    Do you get IR folm easily?
     
  8. ntenny

    ntenny Member

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    Me neither, but I can confirm from personal experience that a Hoya R72 with the Efke film works just fine. (I rate it a whole lot higher than some posters have suggested, but there just seems to be a lot of variation in the amount of available IR light in different locations and circumstances, so it's hard to make a generic pronouncement.)

    It sounds like the OP wants a gel filter, though, and those do seem to run more expensive. I don't think Hoya make gels, do they?

    -NT
     
  9. glbeas

    glbeas Member

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    Do you have any developed but unexposed slide film frames? About three of those stacked is roughly equivalent to an R-72 filter. You will need to experiment to find the best EI.
     
  10. tiberiustibz

    tiberiustibz Member

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    I heard of this, but then I found a hoya 720 IR in 58mm size for 14.95 on ebay.
     
  11. glbeas

    glbeas Member

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    What luck! They aren't usually that cheap.
     
  12. BetterSense

    BetterSense Member

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    I've never heard of the slide film trick before. If that really works maybe I'll fire off a few blanks on my next roll of Ektrachrome. I'm not sure if 35mm is big enough to use as a lens filter though.
     
  13. colrehogan

    colrehogan Member

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    I have a Harrison/Harrison 88A filter, but it is glass and 4 mm thick. I use either this filter with my Maco 820c or a Lee 87 (I think that this is what became the Efke IR film). Both of these filters are 4 inches square. I don't know what lens you were going to use.
     
  14. thefizz

    thefizz Subscriber

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    The cheapest option that I know of is the plastic SFX filter that comes with Ilford's SFX film. Its similar to the R72 filter and works fine.
     
  15. glbeas

    glbeas Member

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    Yeah, really works best with medium format or LF film
     
  16. tiberiustibz

    tiberiustibz Member

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    I also found a square of unprocessed E6 film which I'll try.
     
  17. Aklens200

    Aklens200 Member

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    Hi,
    I use a Hoya R72, works great.
    Only cost me about $US40.00.
    Rich
     
  18. glbeas

    glbeas Member

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    Has to be unexposed and processed. The dyes are essentially transparent in the IR range like a lot of other dyes are. Unprocessed film will not do such a good job due to the silver salts still in the emulsion.
     
  19. 2F/2F

    2F/2F Member

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    What diameter is the lens on your school's camera? If it takes a small-diamater filter, you are in luck.

    I got my R72 in 55mm for about $35.00 from Freestyle because the 72mm, which I would have preferred, was hundreds of dollars.
     
    Last edited by a moderator: May 8, 2009
  20. xtolsniffer

    xtolsniffer Member

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    Cokin do a decent quality IR filter that's equivalent to a Wratten 89b (R72) filter, it's not that expensive and fits their square P type holder. I've used it for the now discontinued Kodak HIE and it works fine. I'm due to take delivery of my first batch of Adox/Efke 820 soon, so looking forward to trying it out.
     
  21. xtolsniffer

    xtolsniffer Member

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    Here's a link to Cokin...

    http://www.cokin.com/filtres.html?=#007

    If you're shooting LF then the X or Z size system might be more appropriate but the filters do get more expensive. The P system is smaller and cheaper but if you're not using especially wide lenses then you might be able to get away with it. I can JUST get away with the P size filters (84x84 mm) on 50mm on 6x7 format.
     
    Last edited by a moderator: May 8, 2009
  22. keithwms

    keithwms Member

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    At the upcoming get-together in Virginia next week, I'll be throwing all manner of filters on my spectrophotometer. That's a 'rainy day' activity that we can do while film and/or prints are washing. So...anybody who wants a filter tested can bring it. I have a glass #87, a gel #87, an r72, and a 93.
     
  23. Chazzy

    Chazzy Member

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    I would give an infrared film a try, just for the fun of it, but I've never seen an infrared filter in Series VI.
     
  24. Soeren

    Soeren Member

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