dsjtecserv

dsjtecserv

Lives in United States Northern, VA, United States
Works as a Technical Director
Joined on Jan 21, 2005

dsjtecserv's recent activity

  • The CoC is the part of that (which you now recognize) that represents the degree of enlargement (magnification if you will) between negative and final image, and the CoC is different for different ...
  • I called you on that misrepresentation before. In the paragraphs immediately above and below the quote, Wikipedia discusses the full subject of depth of field including the role of the CoC and the ...
  • I provided you with links above. You can easily find more. But have you given us not even a link, but any documentation all to support your misconception. No, because it doesn't exist. So if you ...
  • Ah, there's one source of your problem, you don't provide any basis for determining what is "in" and what is "out" of focus. The science of depth of field is all about determining that. I've ...
  • No, Bob, that's not how depth of field is evaluated, and you can't make up your own rules to suit your misconception. As all depth of field calculators readily demonstrate, the depth of field is ...
  • I'm not even sure you even understand what depth of field is. It is not synonymous with detail, and has nothing to do with resolution. It deals only with the question of whether the objects in the ...
  • No need to limit to thought, do it for real. Other people have posted similar demonstrations that show how the Dof does change as a function of image size. Why don't you? Yes, the depth of field is ...
  • Question: other than repeating your misconceptions, what evidence have you brought to the table? You keep pounding the table, but offer neither logical argument nor reference; the rest of us have ...
  • Pain and simple: the is no such thing as depth of field before enlargement to viewing size. That's why no DoF calculator would attempt to report such a meaningless result, and why you will find no ...
  • So we agree, right? If, as you now acknowledge, and I've said all along, that the DoF depends on the total magnification -- magnification from subject to negative and from negative to final image ...
  • What is sharpness other than appearance? You can mislead yourself into considering it be be anything you want. But you are not talking about depth of field as understood by the rest of the world, ...
  • then you aren't intested in depth of field. the results are measurable, and that's precisely what the science the evolved around depth of field does. And, in order to do that, human perception must ...
  • Exactly. One of the previous "graybeard members of this forum, who had been doing photography for something like forever, was fond of point out that "an in focus picture is just one that hasn't ...
  • Yes it does, because depth of field is only meaningful to the extent that someone perceives, it. Objectively, the image itself only consists of an array of progressively larger blur circles the ...
  • And yet you write this without having looked at the explanation given to Aaron, which evidently satisfied him, and has the added benefit of being verifiable correct? Wow. I suggest that you need to ...
  • Cue Lee Jay! March, that's been done, and indeed, when the prints or screen displays are at the same size, the difference in depth of field due to the different enlargement from the two sensor ...
  • The chart directly disproves what you just said. Read this very slowly and carefully now, Bob: Depth of field doesn't exist on the negative or sensor, and you won't find a credible sources that ...
  • Actually it isn't arbitrary or unscientific; there are reasons why that standard print size was chosen for reference, and you can also use different formulas to to slightly alter the presumed ...
  • But as we have pointed out repeatedly, that's not all it is a function of. You are just putting blinders on to the rest. With respect to the a standardized print and viewing distance, after ...
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