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  1. #1

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    Ilford Multigrade 500 head heat and colour filters

    Hello,

    I got problem with my Ilford Multigrade 500 head.
    I have to find somewhere new heat and colour filters.

    All information I got are taken from manual.

    It goes like this:
    Heat filters 2 30 x 15 x 2 mm thick heat absorbing glass
    Colour filters 1 25 x 25 x 1 mm thick
    Blue and green dichroic interference filter coating on glass substrate. Tempered for maximum stability. Cut-off frequencies are selected for optimum grade range with Ilford Ilfospeed Multigrade II paper.

    Parts numbers:
    83425803 - heat filter
    83425802 - green filter
    83425801 - blue filter

    Is it possible to buy the original parts somewhere?
    Maybe you know were?
    Can I order that somewhere?

    I have find heat absorbing glass but it is too tick (3 mm).

    Maybe some of these dichroic interference filter will be good:
    http://www.edmundoptics.com/optics/o...r-filters/1734

    I understand that this is very important part of whole device so I can't be wrong about replacement.

    I would be very grateful for any help.
    I can't work without those parts and I have to solve these somehow.
    Your help and support will be very welcome.

    regards,
    Lukasz

  2. #2

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  3. #3
    Rafal Lukawiecki's Avatar
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    I would not hesitate about Odyssey in UK. John sold me replacement heat and dichroic filters for my 500H when I refurbished mine a few years ago. Great service.
    Rafal Lukawiecki
    See rafal.net | Read rafal.net/articles

  4. #4
    E76
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    I'm interested to know what kind of problem could develop with the filters. I have a Durst Pictograph that has some trouble achieving certain grades and I wonder if the filters are to blame; however, it has always been my understanding that dichroic filters never fade. Is this not the case?

  5. #5
    Rafal Lukawiecki's Avatar
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    In my case, one of the heat filters, and one dichroic filter, were mechanically broken, hence I needed to replace them. John, from Odyssey, mentioned that they do not fade, but I had not tried to verify this info elsewhere. I am satisfied with the range of grades I am getting from my 500H, and it has been relatively consistent for a decade, even having replaced one of the filters.
    Rafal Lukawiecki
    See rafal.net | Read rafal.net/articles

  6. #6

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    Thank you for all suggestions.

    I was just wondering if anybody has precise information about these dichroic interference filter used in Ilford head.

    I have checked datasheet of few Ilford multigrade papers. I was mostly interested in spectral sensitivity but anyway I am not that good in physics to understand all of these.

    I guess the one I have found would work just fine but instead of checking it myself I will contact Odyssey first.

    thanks again,

    regards,

    Lukasz

  7. #7
    paul_c5x4's Avatar
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    Quote Originally Posted by E76 View Post
    I have a Durst Pictograph that has some trouble achieving certain grades and I wonder if the filters are to blame.
    Grades 4 to 5 by any chance ?

    I had a problem with not being able to get the harder grades with an LPL enlarger, changed the lamp, and the problem was solved. Now I have a Durst L1200, I replace the lamp in the dichro head on a fairly regular basis even if it looks OK.

  8. #8
    E76
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    Quote Originally Posted by paul_c5x4 View Post
    Grades 4 to 5 by any chance ?

    I had a problem with not being able to get the harder grades with an LPL enlarger, changed the lamp, and the problem was solved. Now I have a Durst L1200, I replace the lamp in the dichro head on a fairly regular basis even if it looks OK.
    It has trouble with grades 00 and 5. The problem was that the closed loop system would try to keep inserting filters more and more until it could not longer do so, and the motor would jam and throw and error. I always figured the detectors were to blame and I eventually recalibrated them, eliminating the jam, but I always had my doubts as to whether or not something else might be to blame.
    Last edited by E76; 07-07-2012 at 06:55 PM. Click to view previous post history.

  9. #9
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    Quote Originally Posted by szkodazecietuniema View Post

    I guess the one I have found would work just fine but instead of checking it myself I will contact Odyssey first.

    thanks again,

    regards,

    Lukasz
    You actually found some filters that fit? That is fantastic. The Ilford 500 head has quite a range of adjustment (programs 0-7) that you should be able to zero in on a suitable program for you paper and selected filters.

  10. #10

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    Hi there,

    I have some Ilford Muitigrade 500 filters that I am going to sell, either on here or Ebay. I must admit I am not sure what they are worth but a bit as I cannot find any for sale.

    83425803 - heat filter - x12
    83425802 - green filter - x5
    83425801 - blue filter - x5

    Dipping my toe in the water to see what I can see! I only just discovered I have them after holding onto them for about twenty years.
    I found a place selling generic dichroic filters:
    http://www.edmundoptics.com/optics/o...r-filters/1734

    Im genuinely intending to sell them, just need to fix a price. I looked on Ebay.co.uk but there are none there.

    Regards

    Paul

    Paul
    Last edited by silkweed; 10-29-2012 at 08:51 AM. Click to view previous post history.

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