Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 69,714   Posts: 1,514,731   Online: 817
      
Page 23 of 23 FirstFirst ... 1317181920212223
Results 221 to 228 of 228
  1. #221
    Stephen Benskin's Avatar
    Join Date
    Jan 2005
    Location
    Los Angeles
    Shooter
    4x5 Format
    Posts
    1,218
    Quote Originally Posted by Michael R 1974 View Post
    To me, the most important "learning outcome" from reading Henry is a healthly skepticism. It reminds us much of what we read about photographic technique and materials has little in the way of evidence to back it up. And as Stephen has said many times, even when we are presented with data it is important to be given information on the testing procedures, otherwise it is difficult to conclude anything. Sometimes you read an article in a magazine and it looks really sound because is has tables and charts and curves. But what if there were all sorts of errors or sources of error, mistakes etc in the test? As we know there are many variables to manage, and as I've come to learn, designing a proper photographic test is not so easy.
    Michael, to put this into practice, someone should start a new thread where a given methodolgy is critiqued. The example should probably come from online to assure it's accessible to everyone. I think it would be fun, but I have a strange sense of fun.

  2. #222

    Join Date
    Feb 2010
    Location
    Montreal, Canada
    Shooter
    Multi Format
    Posts
    4,472
    Interesting. We certainly have a lot to choose from, including my own tests. Although the feedback we get from people might be quite negative.

  3. #223
    Stephen Benskin's Avatar
    Join Date
    Jan 2005
    Location
    Los Angeles
    Shooter
    4x5 Format
    Posts
    1,218
    Quote Originally Posted by Michael R 1974 View Post
    Interesting. We certainly have a lot to choose from, including my own tests. Although the feedback we get from people might be quite negative.
    With a quick search, there's:

    http://www.jerryo.com/formula/z_speedtest.html

    http://www.halfhill.com/speed1.html

    http://myplace.frontier.com/~cmp2f7cw/10/id1.html

    http://www.lg4mat.net/page8.htmlhttp://www.davidkachel.com/historical/film_spd.htm

  4. #224

    Join Date
    May 2012
    Location
    Nebraska
    Shooter
    Multi Format
    Posts
    273
    --
    Kenton Brede
    http://kentonbrede.com/

  5. #225
    Stephen Benskin's Avatar
    Join Date
    Jan 2005
    Location
    Los Angeles
    Shooter
    4x5 Format
    Posts
    1,218
    Somebody needs to pick one and start a new thread. I think a random choice would be the most unbiased approach.

  6. #226

    Join Date
    Feb 2010
    Location
    Montreal, Canada
    Shooter
    Multi Format
    Posts
    4,472
    Hi Stephen - before moving on here, can I raise a few more issues from Henry's book for your feedback? These concern his Granularity and Acutance tests for films.

    I also wouldn't mind subjecting some of my tests to scrutiny/critique.
    Last edited by Michael R 1974; 02-08-2013 at 10:09 AM. Click to view previous post history.

  7. #227
    Stephen Benskin's Avatar
    Join Date
    Jan 2005
    Location
    Los Angeles
    Shooter
    4x5 Format
    Posts
    1,218
    Quote Originally Posted by Michael R 1974 View Post
    Hi Stephen - before moving on here, can I raise a few more issues from Henry's book for your feedback? These concern his Granularity and Acutance tests for films.

    I also wouldn't mind subjecting some of my tests to scrutiny/critique.
    This really isn't topic I spend much time with. Do you have any concerns with this section? BTW, a good book on these issues is Image Clarity.

    Michael, pick one of the methods, start a new thread, and open it up to critique. If I did it, people might think there's a mouse trap involved.

  8. #228

    Join Date
    Feb 2010
    Location
    Montreal, Canada
    Shooter
    Multi Format
    Posts
    4,472
    Hi Stephen, I do have some concerns with the way in which he comes to a few of his conclusions regarding the effects of development time and CI on acutance and granularity. I'll leave these aside for the time being since these things are a little off topic for the exposure forum - although exposure is one the variables he overlooks in that section (in my opinion). But you know, in the end my overall conclusion based on everything I've read regarding image structure characteristics is that we simply cannot generalize. Also, most everything we read is wrong. We look at the formula for a developer, and based on everything we think we know about how these things work, we think we're getting more acutance or less graininess or lower resolving power or whatever. Well, it appears to depend very much on the film. It also seems to be nearly impossible for a layperson to evaluate image structure characteristics objectively. So, we are left with all the common wisdom, and people see what they want to see, or expect to see.



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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