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    Opticron BGA PC ASF 10x42

    Just found the answer LE means Long Eye relief
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    Opticron BGA PC ASF 10x42

    Hello Pete, I have just bought a pair of Opticron Oregon wp le 8x30. I guess WP is an abbreviation for waterproof but what does LE stand for please
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    Opticron BGA PC ASF 10x42

    I am encouraging her to join the forum as well!
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    Opticron BGA PC ASF 10x42

    That's great thanks for the information Pete
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    Opticron BGA PC ASF 10x42

    OK Pete, thanks I am trying to encourage my friend , who lives in Porlock to return them for inspection. I have downloaded the repair form and asked her to send a covering letter about them Is there an inspection charge please.? She is a retired NHS nurse on a limited income so she would be...
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    Swallow de lux Falcon 8x42 wide angle

    Ok Binastro, thanks that's very helpful. I guess the Swallows binoculars are not waterproof
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    Swallow de lux Falcon 8x42 wide angle

    Can anyone shed any light on Japanese made Swallow Falcon De Lux 8x42 wide angle please? The FOV is quoted as 9 degrees!! Seems phenomenal.
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    Opticron BGA PC ASF 10x42

    I have a friend who dropped her Opticron Countryman bga pc T 8x42 into water. The LHS Diopter is seized. I wonder if these would be still covered by warranty?? I think they are 2010 vintage
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    Opticron BGA PC ASF 10x42

    Thanks Pete very helpful Peter
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    Magnesium or Polycarbonate?

    Yes I have Fujinon similar. Pretty durable and cleat
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    Magnesium or Polycarbonate?

    I have Fujinon 7x50 for sailing. They are polycarbonate, light to use and very durable. Good clarity , can't really fault them
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    Magnesium or Polycarbonate?

    Thanks for all your replies. Sorry I haven't acknowledged them until now. Looks like this thread has opened an interesting discussion!!
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    Magnesium or Polycarbonate?

    Modern binoculars invariably seem to have the body made of Magnesium alloys or plastic, i .e. Polycarbonate. Magnesium alloy bodies always tend to be heavier than polycarbonate, which is an advantage if you are viewing something for a long period. So why aren't all binoculars made from...
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    Opticron BGA PC ASF 10x42

    Thanks Norm . All these abbreviations are very confusing . I wish the manufacturer would just tell make it clear what these mean
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    Opticron BGA PC ASF 10x42

    Does anyone have any experience of these binoculars What do the letters ASF mean , I've not been able to find out on the net
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    What determines the field of view for the same magnification and objective lens?

    Ok thanks
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    Removing fungus from old Porro binoculars

    Thanks Maljunulo Can you give me details please
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    Removing fungus from old Porro binoculars

    Thanks Maljunulo
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    Removing fungus from old Porro binoculars

    Thanks Phillip
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    Removing fungus from old Porro binoculars

    Thanks Phillipp, They look similar to some Swift models. The number JB 133 plus serial number is shown . Looks like there is a screw threaded clip which keeps the lens in. Photo doesn't show fungus very well but I have cleaned the exterior of the lens and something still shows on the inside...
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    Removing fungus from old Porro binoculars

    I bought a pair of Porro 10x 50. Charity shop for £15 recently. They aren't waterproof and it looks like there is some fungus growth on the inside of the objective lens. They are Japanese optics with fast focus lever sold by Boots the chemist in the UK. They are clearly generic badged by Boots...
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    What determines the field of view for the same magnification and objective lens?

    It's been an interesting discussion, thanks everyone for your comments.
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    What determines the field of view for the same magnification and objective lens?

    The aFOV is set by the field stop diameter and eyepiece focal length given by the equation: aFOV=2arctan(r/fe). Should' r ' read field stop radius rather than diameter?
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    What determines the field of view for the same magnification and objective lens?

    Thanks for getting back to me
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    What determines the field of view for the same magnification and objective lens?

    OK thanks, it's interesting that some older Porro designs like the Minolta range had a much wider fov than some modern roof prism types but of course they were heavier and less compact.
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