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 polarization doesn't come from the light source, but from the reflection itself; the light is polarized by the physics of reflection. A polarizer works just fine to cut reflections from water ...
  • Just do a proper test and report back. Dave
  • This simply not true, and demonstrably so. Any properly-made polarizer will have uniform transmission across its surface, and isn't affected by the angle of incidence. (Disregarding reflection ...
  • It's not at all clear what you think that proves. Perhaps you should explain. There is no question that individual polarizers show a distinct darkening of the SKY at a 90 degree angle to the sun, ...
  • The same problem IS present on normal lenses as well as wide angles. I know that because I have experimented extensively with combinations of linear and circular polarizers. the issue has nothing ...
  • I'm reminded of a photo taken with a pinhole camera with an aperture something like of f/infinity-1 that recorded a year of light on a bridge scene in England, I think it was. Just as with your ...
  • All still pictures, regardless of shutter-open duration, are "moments", in that they represent a condensation of a certain amount of time at a certain place into a single impression. Whether they ...
  • I just looked at your video, and it seems that in fact there is a very substantial reduction in the reflection from the window. Watch the reflection of the wall surface surrounding the TV: if goes ...
  • Sorry, that's not true. The polarization is created by the reflection of the light off the surface, not by the sources. There is nothing unique about sunlight that makes it polarized, and nothing ...
  • Since no one else has done it, I have to warn you against variable NDs. Because they use crossed polarizers, there will be a very distinct pattern of non-uniform density and color across the frame ...
  • I want to emphasize harcourtfenton's point: sharpness and detail are not the same thing. A high-resolution, multiple image panorama can contain more detail than a single shot of the same scene, ...
  • But you realize that a 12 mm f/2 on four thirds is equivalent to a 24 mm f/4 on full frame, in terms of field of view and depth of field? Similarly, a 14 or 15 mm at f/2.5 is the equivalent of ...
  • I'm going to suggest that you are putting the cart before the horse. I think you should start out getting a little experience with how panoramas work -- getting a feel for them -- before jumping ...
  • Um, crop factors greater than 1.0 are used all the time to describe the relationship between medium and large format and the de facto 35 mm benchmark, but it is also valid to change the benchmark ...
  • Yup, figures. You can't keep up even a semi-rational discussion for even a full post; and when faced with fact-based arguments, you just dissolve into mouth-foaming ad hominen . Do you actually ...
  • And that's exactly what a four thirds image is, in comparison to any larger format: a subset of the field of view given by a larger image, without the additional information recorded by the larger ...
  • Since your replies have become increasingly strident, and you haven't attempted to explain your rationale in any kind of rational way (instead choosing to to toss insults, which you think will ...
  • Replied in Back to front
    Even though Barnack produces angle of view (mislabeled as field of view) as a result, it starts with focal length as an input. It could be reprogrammed to use AoV and an input, with considerably ...
  • That's the point, angles or focal length, they're both abstractions that need to be learned by experience (or applied after careful calculations!). Using AoV offers no advantage. Exactly, and your ...
  • Replied in Oh, dear
    Then I'll be a little plainer: your actions are both discourteous and unethical, violate internet forum etiquette and the rules of citation you should have learned in junior high. Your ...
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