I just finished measuring usable eye relief on virtually all of the binoculars in my collection.
See https://binocular.ch/the-pinac-collection/#collection ,
then click on any binocular in the collection that you are interested in, to find the eye relief / usable eye relief data in the individual posts.
This covers roughly 250+ binoculars and may be useful information for some of you.
Just to sum up again what this is about:
"Eye relief" is usually mentioned in binocular specs by the manufacturer and measured from the surface of the so-called "eyelens" (the outermost lens of the eyepiece), but most often, such information is of limited use since eyecup designs most frequently don't allow you to place your glasses directly against the eyelens.
"Usable eye relief" is measured from the rim of the eyecup (folded down or screwed fully in) and is most often more relevant for eyeglass wearers.
Two caveats regarding the information I provide on my website:
I have tried to measure carefully, but measuring usable eye relief is sometimes not as straightforward as you might think ("uneven" design of eyecups, etc.), so the stated measured values may perhaps be up to 0.5mm beside the correct value. So "12 mm" in fact means anything between 11.5 mm and 12.5 mm.
Plus, e.g. "15 mm" on one bino does not necessarily mean the same thing on another bino, because different shapes, forms and sizes of eyecups will allow you to get closer or less close to the eyepiece with your glasses.
Feedback welcome.
Canip
See https://binocular.ch/the-pinac-collection/#collection ,
then click on any binocular in the collection that you are interested in, to find the eye relief / usable eye relief data in the individual posts.
This covers roughly 250+ binoculars and may be useful information for some of you.
Just to sum up again what this is about:
"Eye relief" is usually mentioned in binocular specs by the manufacturer and measured from the surface of the so-called "eyelens" (the outermost lens of the eyepiece), but most often, such information is of limited use since eyecup designs most frequently don't allow you to place your glasses directly against the eyelens.
"Usable eye relief" is measured from the rim of the eyecup (folded down or screwed fully in) and is most often more relevant for eyeglass wearers.
Two caveats regarding the information I provide on my website:
I have tried to measure carefully, but measuring usable eye relief is sometimes not as straightforward as you might think ("uneven" design of eyecups, etc.), so the stated measured values may perhaps be up to 0.5mm beside the correct value. So "12 mm" in fact means anything between 11.5 mm and 12.5 mm.
Plus, e.g. "15 mm" on one bino does not necessarily mean the same thing on another bino, because different shapes, forms and sizes of eyecups will allow you to get closer or less close to the eyepiece with your glasses.
Feedback welcome.
Canip
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