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  1. J

    New Horizons II

    Omid, post#210: https://www.birdforum.net/threads/new-horizons-ii.378895/page-11#post-4009330 Hi, I hope you agree with the technical literature that the astronomically used Kepler telescope is focused to infinity and the virtual image appears at infinity because the excellent rays of the ray...
  2. J

    New Horizons II

    I now solve Omid's task according to post #201: https://www.birdforum.net/threads/new-horizons-ii.378895/page-11#post-3984491 The virtual image is always created at infinity (and is therefore not constructible), since in any case the exit rays of the eyepiece are parallel - assuming that an user...
  3. J

    New Horizons II

    versus post #275 Fig. 4 (objective image for terrestrial objects in non-infinite distances)?! and Fig. 5 (eyepiece image formation) is wrong: The real intermediate image of objective is in focal plane of eyepiece (simple magnifier function of eyepieces). The virtual image is therefore not...
  4. J

    New Horizons II

    Omid, post #275, Fig. 5 Virtual image of the eyepiece, questions (The construction of the real intermediate image of the eyepiece is not a problem. The focal length is not necessary, the consideration of the focal length ratio (magnification) is sufficient for an overall result. It is only about...
  5. J

    New Horizons II

    Hi Omid, that is what I wanted to show. ;-) But thanks for more solution hints, which I will now look at and read. I will still do correct homework. :) I also studied feedback controller technology for a few semesters. A long time ago. I never needed it professionally. Too bad, it was a...
  6. J

    New Horizons II

    Virtual image, version 01: The homework of a lazy schoolgirl Omid's task: At what distance do we see the virtual image of binoculars? Distance of the observation object: d = 100 m Height of the observation object: h = 10 m Magnification of the telescope/binoculars: 10x...
  7. J

    New Horizons II

    Hi Omid, I will try this with pencil, ruler and paper, probably on Monday. Again, back to the last topic, luminance control or depth of field as a primary or secondary effect. With 2 control loops, can one really say across the board which is primary and which is secondary? It is a...
  8. J

    New Horizons II

    Omid, first of all, thank you. You are absolutely right that pupil/iris width is influenced by many more things than just luminance. Note: I have slightly changed my text on optics, nothing in principle, just a few better words. I don't see your pictures (?), there are big blanks in your post...
  9. J

    New Horizons II

    I see the following possibilities here for an automatic focus with a control loop consisting of a measuring element, feedback controller and actuator, among other (optical) things: (multi-field) distance measurement as in modern cameras electronic feedback controller Possibilities for the...
  10. J

    New Horizons II

    AW to post #261: Hello Omid, thank you for your detailed answer. Each point I can not judge with my current expertise - but in subsequent things I have problems with my current knowledge. I must explain that I do not well understand complex technical texts in English language, which do not...
  11. J

    New Horizons II

    I don't like personal unspecific sweeping attacks on Omid. Objective special criticism is perfectly fine. One compares the quality of the contributions of Omid with the alpha animals and writing maniacs often with opinions without for third comprehensible reasons, facts and experiences in posts...
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