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

Recent content by moyang_mm

  1. M

    New Product Introduction Today From Swarovski ?

    Do they use Abbe–Koenig prisms?
  2. M

    New Product Introduction Today From Swarovski ?

    New Product: Swarovski NL Pure 8x42/10x42/12x43 sorry for the typo in the title: it should be 12x42 Model: 8x42 10x42 12x42 FoV: 159, 136, and 113m / 1000m Transmission > 91% Weight > 800g Price > 2800 Euros Launch Date: July 1, 2020
  3. M

    Monarch HG 10x42 - How many ED elements?

    Nikon mentions in the Chinese version of the sport optics brochure that Monarch 5, Monarch 7, and Monarch HG all have two ED elements per tube. The brochure can be downloaded from Nikon: https://www.nikon.com.cn/tmp/CN/4016499630/4196861409/2075060314.pdf Not sure how reliable this...
  4. M

    Where are the aspherics?

    Top spotting scope with DSLR digiscoping adapters is no substitute for good telephoto lens either. They are optimized differently. The point is optically telescope is simpler than telephoto lenses. Were the market for scopes as competitive as the market for camera lenses, telescope should be...
  5. M

    Where are the aspherics?

    A fairer comparison should be between telephoto lenses and alpha spotting scopes? Swarovski ATX 25-60x65 costs $3775, but optically much simpler than the 70-200 f/2.8.
  6. M

    Where are the aspherics?

    I think the "alpha" binoculars are very much overpriced due to the lack of economy of scale and the lack of competition. Look at the internals of a Canon EF 70-200mm f/2.8L IS II, which features five ED glass and one fluorite crystal, and 23 elements in 19 groups in total. It is also made in...
  7. M

    Where are the aspherics?

    Yes, you are right. My point is that we only pay attention to the very center of the retina, whereas in cameras the entire image circle needs to be corrected. The lenses on smartphones are much simpler (usually only 6 or so elements without ED or ASPH) because the sensor is so small.
  8. M

    Conquest where made?

    You need to spend on quality control to get good quality product no matter where you manufacture them. Given the same manufacturing cost, you usually get the highest quality from a factory in China; for a given quality specified, manufacturing in China is usually the cheapest. Things are...
  9. M

    Where are the aspherics?

    I may be wrong as I am not an optical engineer. I think one reason that ASPH elements are more common in photographic lenses than in binoculars is that sensors in DSLR/mirrorless cameras are much bigger than "sensors" (human eye) of binoculars. The pupil of an eye is at most 7mm, but a APS-C...
  10. M

    Difference between Phase-correcting P-coating and SWAROBRIGHT?

    Thanks for the excellent explanation, John. I've received reply from Swarovski Optik (see below), the leaflet you post indeed contains an error.
  11. M

    Difference between Phase-correcting P-coating and SWAROBRIGHT?

    Just out of curiosity, what is the difference between the two, Phase-correcting P-coating and SWAROBRIGHT? From EL series' product page, for example https://www.bhphotovideo.com/c/product/1176824-REG/swarovski_32208_8x32_el_binocular_with.html both types of coating are mentioned: In...
  12. M

    Monarch HG 10x42 - How many ED elements?

    Hi Jerry. I completely agree with you. The only thing that matters is the end result, not the types of material used. I am fairly new to binoculars, but one thing I've noticed is the lacking of a standard, objective measurement of optical qualities. Almost all camera lens mfrs provide a MTF...
  13. M

    Monarch HG 10x42 - How many ED elements?

    Hi John, The highest-end binoculars like Swarovski EL SV or Leica Noctivid don't specify how many elements are made of special glass either. It let me wonder if this means they only have single ED/UD/FL element as well. Zeiss Victory SF does mention that "The UFL concept delivers them all. In...
  14. M

    Monarch HG 10x42 - How many ED elements?

    That makes sense. If the objective lens group is indeed a doublet, then we can be certain that Monarch HG only has one ED element.
  15. M

    Any special glass (ED, fluoride, etc) used in CL series?

    Joachim, thank you for the very informative post. I've learned a lot. Really appreciate it.
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