Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,224   Posts: 1,532,573   Online: 992
      
Results 1 to 4 of 4
  1. #1
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    22,972
    Images
    65

    Definition charts

    These are definition charts of an approximate grade 2 paper on 3 papers compared with Ilford MGIV.

    Conditions as in other post, but the ilford was exposed for 12" at f16 with a Magenta 30 which gives grade 2.

    The order is Baryta, Smooth, Watercolor and Ilford MGIV.

    PE
    Attached Thumbnails Attached Thumbnails print def baryta.jpg   print def smooth.jpg   print def watercolor.jpg   print def ilford.jpg  

  2. #2

    Join Date
    Oct 2006
    Location
    Van Buren, Arkansas
    Shooter
    Large Format
    Posts
    2,412
    Images
    101
    Wouldn't this more correctly be called Resolution charts? Please correct me if I am wrong.

  3. #3
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    22,972
    Images
    65
    Ok, lets call them Resolution Charts. I really don't care one way or the other. I called them Definition Charts.

    PE

  4. #4
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    22,972
    Images
    65
    I was asked off-line why I had some charts that were white with black lines so here is the explanation.

    You do this test with both a positive and a negative chart (by whatever name you wish to call it). The chart above measures fill in or the creep of the black image through adverse edge effects or image scatter into the white bars. The other chart measures spread, or the creep of the black bars into the white background.

    Due to the differences in exposure and chemical effects, each type of chart gives a subtly different result. I ran both types of test but just posted the chart with the white bars.

    PE



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin