• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com pie forums private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • paul wheaton
  • Anne Miller
  • Carla Burke
  • Nancy Reading
  • John F Dean
  • Timothy Norton
  • Jay Angler
stewards:
  • r ransom
  • Pearl Sutton
  • Tereza Okava
master gardeners:
  • Christopher Weeks
gardeners:
  • M Ljin
  • Megan Palmer
  • Kate Downham

Broken binoculars

 
master gardener
Posts: 7059
Location: Carlton County, Minnesota, USA: 3b; Dfb; sandy loam; in the woods
4497
8
forest garden trees books chicken food preservation cooking fiber arts seed woodworking homestead ungarbage
  • Likes 3
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I dropped and broke my wife’s binoculars. That’s not cool, obviously, but after doing some research and buying an upgrade replacement, it was time to throw the old ones away. So of course, I took them apart to see how they work.
IMG_6270.jpeg
Everything
Everything
IMG_6271.jpeg
Prisms
Prisms
IMG_6272.jpeg
My dirty alt key through the magnifier
My dirty alt key through the magnifier
IMG_6273.jpeg
This seems to not magnify much but to narrow the field of focus
This seems to not magnify much but to narrow the field of focus
 
Christopher Weeks
master gardener
Posts: 7059
Location: Carlton County, Minnesota, USA: 3b; Dfb; sandy loam; in the woods
4497
8
forest garden trees books chicken food preservation cooking fiber arts seed woodworking homestead ungarbage
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I don't have any kind of background in optics, but I think what's happening is that the prisms are bouncing the light back and forth so that a relatively short lens gets to act like it's three times as long, enhancing the magnification effect in exchange for a slight loss of fidelity. And I'm pretty sure the replacement I bought doesn't do that. It's longer in the hand and seems like a straight shot with no room for the extra channels. It's also crisper but maybe a little slower to focus. Hopefully that last bit is just a matter of getting used to it.
 
Toto, I have a feeling we're not in Kansas anymore. Check the tiny ad.
Heat your home with the twigs that naturally fall of the trees in your yard
http://woodheat.net
reply
    Bookmark Topic Watch Topic
  • New Topic