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Message: <blockquote data-quote="brocknroller" data-source="post: 1727269" data-attributes="member: 665">Chromatic Aberration Rankings in 12.1 BinocularsABSTRACT: The above chromatic aberration binocular tests were conducted over a 10-year-period, from 1999 to 2009, using a power cable to test for vertical CA and the edge of a matte black power transformer to test for later CA. The binoculars were mounted for the test in the same location for all tests. More than one binocular was used for each test, with up to 10 binoculars during one test (since this report is limited to ZR and Nikon binoculars, some of the binoculars were excluded from the sample group). Test results were recorded in a notebook and bins were rated from 1-5 (low to high CA) with + or – when ratings fell in between whole numbers. These tests were not intended to be definitive, scientific, or analytical, but were designed for comparative purposes only. The author is an uncredentialed, unlicensed, self-trained observer, who has spent an average of 6 hours a week looking through binoculars over the past 10 years, as well as reading 10,563 binocular forum posts, numerous binocular reviews, and contributing 543 posts to one binocular forum and 1,951 posts to another. To at least feign scientific legitimacy for naysayers, nitpickers, and nerds, for one session the author used a “double blind” test, but the subjects found it difficult to judge CA whilst looking through the two blindfolds. Readers of this report are asked to take the results cum granis salis, and to conduct their own tests since one’s sensitivity to CA can vary from eye to eye, from brain to brain, and even from “expert” to “expert”. INTRODUCTION. See Abstract.MATERIALS AND METHODS. See Abstract. RESULTS. See post # 6.DISCUSSION: See this thread. ACKNOWLEDGMENTS. The author would like to thank the following individuals for contributing binoculars for testing: Steve (mooreorless), Walter Locke (MIA), Jerry (NDHunter), Ron (Surveyor). Thanks also to Steve for taking photos of these binoculars individually and collectively. Also a shout out to Ed (elkcub) for inspiring this "paper". LITERATURE CITED:  10,563 posts on Cloudy Nights and Birdforum binocular forums. APPENDIX. Still intact, though sometimes it's hard to tell with IBS.DISCLAIMERS: The author does not work for Zen Ray or Nikon, though he wished he did and is available for consulting work at very reasonable rates.</blockquote>

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