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  1. WJC

    Checking collimation at home

    Hi Brink, And thanks for getting back to me without judging me too harshly; that alone is refreshing! Taking subjectivity out of the operation is admirable, but when you get to a certain level of precision, it comes back into play. Many wannabe “experts” ........ aren’t. Too many folks take my...
  2. WJC

    Checking collimation at home

    Hi Brink, Judging misalignment requires eyes ... only. That is, if the error is great enough or the observer’s spatial accommodation adequate enough.*** Correction of the alignment requires considerably more. If you are willing to spend time following Rafael’s train of thought, it works. My...
  3. WJC

    Checking collimation at home

    The first thing I must say is that I have the utmost respect for Rafael Chamon Cobos. He has shown himself to be the most clever and original person with regards to Collimation and Conditional Alignment circles that I have ever known. He’s a totally dedicated practitioner in a discipline in...
  4. WJC

    Checking collimation at home

    If somebody says you’re wrong, tell him I said… Blow it out your shorts!
  5. WJC

    Checking collimation at home

    You, my friend, are quite welcome!
  6. WJC

    Checking collimation at home

    That is not at all what we are after. I had hoped that I had explained this simple procedure simply enough that I wouldn’t have to print the whole thing. I see it wasn’t so. Thus, here is the whole encha ... anche ... enchi ...... taco. It has been posted before on Birdforum and Cloudy Nights...
  7. WJC

    Checking collimation at home

    That is 100% irrelevant. You view through optical elements NOT containers of those elements or support mechanisms. The axle is supremely important. But one must consider what is and IS NOT important!
  8. WJC

    Checking collimation at home

    Checking collimation will tell you that. Don't over-think things.
  9. WJC

    Checking collimation at home

    1: Objective 1. 2: The second objective. 3: The axle, which is the KEY to accurate collimation. EVERYTHING else—all the immature garbage on the Internet—deals with Conditional Alignment—not collimation. But I have been trying to teach this for 46 years. The engineers and the more erudite get...
  10. WJC

    Checking collimation at home

    Convergence AND Divergence are on the X axis; step (or Dipvergence) is on the Y axis. If you "need" to test it ... you don't need to ... test it!
  11. WJC

    Checking collimation at home

    Your first line is correct. Divergence is pretty hard for the eye / brain to deal with. That is why the stiffer tolerance. Convergence or crossover much less critical. Try crossing your eyes ... see? Step is the also known as Dipvergence. and it's really hard to tolerate. Some time-wasting...
  12. WJC

    Checking collimation at home

    Hi Hauksen: ‘Buy ya books ... send ya to school and still ya want more. Okie Dokie. Here ya go. The first attachment is Dr. Johnson’s tolerance, which is what I use. The second shows 10 other standards. ALL WILL GET THE USER TO A COLLIMATION PRECISION MORE STRINGENT THAN VIRTUALLY ANY...
  13. WJC

    Checking collimation at home

    The two dots through the binoculars and over the top of the binoculars. Bring those dot together in the upper and lower swing and you have it.
  14. WJC

    Checking collimation at home

    I'm kind of wondering where the huge post I had created—complete with 7 pages of text and several photos went.
  15. WJC

    Checking collimation at home

    William, I have been away since post 7. But I will try to answer William’s questions and a few other that came along the way. But first, I would like to support Binastro’s take on the matter. IF IT AIN’T BROKE ... DON’T FIX IT! William: The aspect of monetary gain: I would certainly like to...
  16. WJC

    Checking collimation at home

    I have addressed this many times in lectures, articles, and books since 1972.
  17. WJC

    Checking collimation at home

    No All are available for amazon.com
  18. WJC

    Checking collimation at home

    Hi William, Thanks for the kind words. I hope you know you will probably be burned in effigy for it. The most hated man is the one who tells the truth. First, if you have to TEST for collimation precision, you don’t really need to. The eye / brain combination is a pretty neat arrangement. Some...
  19. WJC

    Checking collimation at home

    220806 If I ever mention my books by name, Lee will whack my wrists ... that hurts. So, I will just offer images of the covers. Book #1 has 38 pages on collimation vs. conditional alignment which has been accepted as fact by SPIE (the Society of Photo-Optical Instrument Engineers) and Book #2...
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