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<blockquote data-quote="Kevin Purcell" data-source="post: 1403506" data-attributes="member: 68323"><p>I rather doubt this is a "cherry" unit though I only have a sample of one which makes it difficult to tell. </p><p></p><p>For example things like stray light resistance (mentioned on another thread) has more to do with design (perhaps the narrow FOV and perhaps coatings) than random variation. The same with brightness that's all to do with AR coatings and prism coatings (AR, PC and mirror coatings on the prism).</p><p></p><p>The sharpness test puts the bins in a very small range (it's not like one is sharp and the other is blury ... these are subtle differences) though I think you can easily tell the difference between the top and the bottom of the range. For me they should be the same (as say the Chinese EDs like the ZR ED, Promaser, Hawke and the Zeiss FL) i.e. my eye should be limiting acuity. I did find this with result with similar sorts of eyeball tests. </p><p></p><p>One question I have is what I'm actually measuring with my "white light sharpness" test. Is it actual resolution? Is it CA? Is it small aberrations? Other small variations?</p><p></p><p>This particular Legend is a recent one. It was drop shipped to me from Bushnell in December so I suspect it is current production. It also has a "starburst" on the retail box advertising 15% lighter and new improved eyecups). It's always difficult to tell when a company "slipstreams" a new product (with same name and spec though perhaps slightly better made or with small improvements) into the "retail channel". OK, enough buzzwords.</p><p></p><p>I think this perhaps is a difference between bins looked over time and bins checked out in a store. I don't think I rely to heavily on the latter. So I prefer to stack up a group of bins and test them back and forth (and in some cases leave them and come back to them to try the same thing again ... are my tests actually reproducible?).</p><p></p><p>There is also the possibility of personal bias which I'm conscious of and really try to avoid (either positively or negatively) by deciding on some test then ranking the bins on that test. </p><p></p><p>How valid the test is of course may be another question.</p></blockquote><p></p>
[QUOTE="Kevin Purcell, post: 1403506, member: 68323"] I rather doubt this is a "cherry" unit though I only have a sample of one which makes it difficult to tell. For example things like stray light resistance (mentioned on another thread) has more to do with design (perhaps the narrow FOV and perhaps coatings) than random variation. The same with brightness that's all to do with AR coatings and prism coatings (AR, PC and mirror coatings on the prism). The sharpness test puts the bins in a very small range (it's not like one is sharp and the other is blury ... these are subtle differences) though I think you can easily tell the difference between the top and the bottom of the range. For me they should be the same (as say the Chinese EDs like the ZR ED, Promaser, Hawke and the Zeiss FL) i.e. my eye should be limiting acuity. I did find this with result with similar sorts of eyeball tests. One question I have is what I'm actually measuring with my "white light sharpness" test. Is it actual resolution? Is it CA? Is it small aberrations? Other small variations? This particular Legend is a recent one. It was drop shipped to me from Bushnell in December so I suspect it is current production. It also has a "starburst" on the retail box advertising 15% lighter and new improved eyecups). It's always difficult to tell when a company "slipstreams" a new product (with same name and spec though perhaps slightly better made or with small improvements) into the "retail channel". OK, enough buzzwords. I think this perhaps is a difference between bins looked over time and bins checked out in a store. I don't think I rely to heavily on the latter. So I prefer to stack up a group of bins and test them back and forth (and in some cases leave them and come back to them to try the same thing again ... are my tests actually reproducible?). There is also the possibility of personal bias which I'm conscious of and really try to avoid (either positively or negatively) by deciding on some test then ranking the bins on that test. How valid the test is of course may be another question. [/QUOTE]
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