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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Recent content by Hans Weigum

  1. H

    Best tripod head for spotting scope?

    Excessive (and useless) weight is just one aspect, as mentioned elsewhere. Lack of stability of this setup is even more important. Tripods and their accessories should improve stability (=lack of motion). Flexibility is opposite to stability With the resistance against...
  2. H

    Let's talk PORROS!

    Here is a detailed explanation how this P-coating should work: https://www.juelich-bonn.com/jForum/file.php?9,file=1967,filename=P-Belag_Weyrauch.pdf and here the expert Holger Merlitz mentions its limitations and casts doubts about the ability of manufacturers to fully exploit the benefits of...
  3. H

    Let's talk PORROS!

    Talking about Porros, not to forget: Leicas newest Geovids are fitted with Perger-Porros. Hans
  4. H

    Weight in relation with steadiness?

    Six degrees of freedom - Wikipedia These six degrees of freedom define the position and orientation of an object (here observation instrument) in space (or in its environment) but applies as well to changes of position in time (=movement , here oscillations). Out of these six degrees...
  5. H

    Kowa 883 - best arca swiss plate?

    Hallo Henning Such Hirth-type couplings are not just an idea borrowed from a different world, they get regularly used by camera professionals, often using equipment considerably heavier than average amateurs do...
  6. H

    Kowa 883 - best arca swiss plate?

    If this optical industry, not just Kowa, could agree to a single genuinely sound universal design, integral to the interface between optical device and attachments, similar to: Die Arri-Rosette the permanent discussions on Arca-Swiss-type plates being not satisfactory, might come to an end...
  7. H

    Kowa 883 - best arca swiss plate?

    Finally the first time, to my knowledge in this forum, the debate over quick-change-plate-technology is nearing a level of professional knowledge with the introduction of terms as shear and others more, that a real gain of comprehension, overtaking even that of manufacturers, leading to real...
  8. H

    Kowa 883 - best arca swiss plate?

    Why not use ISO 10664 hexalobular internal, better known under a registered name Torx. This drive system is definitively superior to in-hex, not only torque-wise. The quite relevant problem of over tightening should not get solved by a substandard drive system. Over tightening is not only a...
  9. H

    Kowa 883 - best arca swiss plate?

    Dear Alex I see much clearer now, in how far our points of view differ: You seem to agree, that the design common to all Arca-Swiss-type plates might not be ideal. But as no better one seems to be generally available, you reached to a selection of brands you feel, that they had made the best...
  10. H

    Kowa 883 - best arca swiss plate?

    Dear Alex I understand, that you consider it as your noble mission to warn a general public from substandard (Arca-Swiss-type) products, based on your extensive market research and testing. An effort you took, because, your enthousiasm showing, you firmly believe in this type of product. Which...
  11. H

    Kowa 883 - best arca swiss plate?

    Hallo Alex I fully understand, that you cannot accept my statements. Main purpose of this forum seems to be talking about, not to solve problems. Problems solved would eliminate all need for further discussions. Not to spoil the ongoing discussion is one of the reasons not to disclose my...
  12. H

    Kowa 883 - best arca swiss plate?

    Hallo Henning You are right, that in the detailed text I quoted, the problem of antirotation gets hardly covered. I was mentioning it all the same, as it gives the most detailed design information I could find so far, helping better to understand this design and find its several flaws. In my...
  13. H

    Kowa 883 - best arca swiss plate?

    The fact, that loosening of Arca-Swiss plates, disregarding being originals or copies continues to be a permanent subject also in this forum prooves, that the requirements are obviously more demanding than the too primitive concept of this solution. There are additional rules of mechanical...
  14. H

    Tripod mount for Habicht 7x42 GA

    Very difficult to find, as no longer manufactured since years. https://www.astroshop.de/adapter/docter-stativklemme-fuer-nobilem-serie/p,23455 Hans
  15. H

    Tripod mount for Habicht 7x42 GA

    But, as you might realise, I use this collection to gain ideas for further improvements and new designs. Hans
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