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  1. B

    Historical Review of Swift 804 Audubon Binoculars

    The Takumar lenses contained thorium glass, which became coloured over time. UV can reverse this, but can also affect cement or balsam. I have not found any binocular that contains thorium glass, although elbow telescopes with old Kodak eyepieces may contain thorium glass. Regards, B.
  2. B

    Historical Review of Swift 804 Audubon Binoculars

    Possibly 1970? Regards, B.
  3. B

    Historical Review of Swift 804 Audubon Binoculars

    Dougie at Glasgow Binocular Repairs sadly passed away a few years ago. Regards, B.
  4. B

    Historical Review of Swift 804 Audubon Binoculars

    I am glad the binocular works. I'd leave well alone if things seem O.K., unless a professional advises otherwise. I sometimes need 1 or 1.5 prism horizontally. Sometimes nothing, so 11 dioptres is a lot. My eyes get tired quickly, but if I rest them for 5 or 10 minutes things improve a lot...
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    Historical Review of Swift 804 Audubon Binoculars

    Yes, I did think about this. With an old binocular it may be wise to keep out of strong sunlight and just keep in a dry warm room. If the fungus is on the front of the eyepiece field lens or prism accessible to just taking off the eyepiece I suppose it could be cleaned without affecting...
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    Historical Review of Swift 804 Audubon Binoculars

    If the binocular doesn't give any sign of double images, I would use it as is. The fungus won't get better, but has probably been there a long time. You could try leaving it in sunlight so that the light shines on the fungal area. I found a very good example in the charity shop for £15, but...
  7. B

    Historical Review of Swift 804 Audubon Binoculars

    If the sand is in the focus mechanism then it may need attention. Otherwise if well aligned it should be O.K. Regards, B.
  8. B

    Historical Review of Swift 804 Audubon Binoculars

    I have a Kodak Medalist camera. Not that rare (: B.
  9. B

    Historical Review of Swift 804 Audubon Binoculars

    Well done Ed, I also turned up Southern California Edison but not their emblem.
  10. B

    Historical Review of Swift 804 Audubon Binoculars

    SCE seems stuck on afterwards. Maybe a store name?
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