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Recent content by Huang_Lingyun

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    Abbe-Koenig vs Schmidt-Pechan?

    Abbe-Koenig prisms system will increase the size and weight of binoculars. Now I think vacuum coating techniques can resolve the weakness of Schmidt-Pechan prisms system. Such as FBMC, phase corrected, super high reflection dielectirc coating, etc.
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    Hawke Frontier ED 8x43!

    I also want to know what samller models you perfer to. 32mm or 36mm versions? Thank you!
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    Hawke Frontier ED 8x43!

    Thanks a lot for your detailed review and it is so comprehensive. I almost find twenty points in your review. Please let me comment some points from my view. I hope you can understand my English. Maybe you will find many mistakes about the syntax.;) 1. This binocular utilizes the open bridge...
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    Hawke Frontier ED: another open bridge ED bin from China

    Regarding the image quality from the center to the edge of Field Of View, in optical system design, it is quite difficult to correct the imaging tolerance for the outter FOV from 75% to the edge. So If we want a flat FOV, sometime we have to reduce the FOV. For exsample, some 8X42 binoculars...
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    Hawke Frontier ED: another open bridge ED bin from China

    Steve C , Thank you. Generally speaking, if one brand(such as Hawke, or Promaster, or Bushnell) does not require the OEM factory to design and manufacture binoculars for its own worldwide exclusive ("worldwide exclusive" means that the brand should pay all of the research & development charge or...
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    Bushnell Excursion Ex

    Bushnell Excursion EX at 42mm has the same optical system as Excursion EX at 42mm. But the Excursion Exs come with Open hinge design and Magnesium alloy body
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    Promaster Infinit Elite ELX ED 8x42

    The testing by FrankD is very professional
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    Hawke Frontier ED: another open bridge ED bin from China

    Hi FrankD, You are right. But the Hawke models currently don't include the hydrophobe coating, which you can find on the Bushnell Elite.
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    Hawke Frontier ED: another open bridge ED bin from China

    Hi all, Can I join in the the discussions? I am working in an optial company in China and I think maybe I can answer some questions of binoculars. At the same time, your suggestions are much helpful for us. Best regards, Huang Lingyun
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