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Binoculars & Spotting Scopes
Binoculars
Eye relief - rule of thumb method?
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<blockquote data-quote="The-Wanderer" data-source="post: 3528065" data-attributes="member: 121494"><p>Pete,</p><p></p><p>Quote </p><p></p><p>We measure from the outmost/top edge of the eyepiece in its lowest position (twisted down or folded down) to the point at which the exit pupil diameter is measured to be at it's maximum/optimum e.g. 5.25mm for an 8x42 binocular. </p><p></p><p>Unquote</p><p></p><p>Was this measurement method always thus? I am contemplating buying an Opticron Discovery 8x32, which your website gives eye relief as 17 mm, to use as a highly portable camera. If this figure is real it will not likely suit me but if it is measured as you describe, it should be good.</p><p></p><p>How far is the ocular glass behind the plane of the collapsed eyecup rim?</p><p></p><p>Many thanks</p></blockquote><p></p>
[QUOTE="The-Wanderer, post: 3528065, member: 121494"] Pete, Quote We measure from the outmost/top edge of the eyepiece in its lowest position (twisted down or folded down) to the point at which the exit pupil diameter is measured to be at it's maximum/optimum e.g. 5.25mm for an 8x42 binocular. Unquote Was this measurement method always thus? I am contemplating buying an Opticron Discovery 8x32, which your website gives eye relief as 17 mm, to use as a highly portable camera. If this figure is real it will not likely suit me but if it is measured as you describe, it should be good. How far is the ocular glass behind the plane of the collapsed eyecup rim? Many thanks [/QUOTE]
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Eye relief - rule of thumb method?
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