Telescope Reviews: William Optics 7x50 ED binocular minireview

Telescope Reviews: William Optics 7x50 ED binocular minireviewholger_merlitzsageReged: 02/08/04Posts: 207Re: WilliamOptics 7x50 EDbinocularminireview[Re: EdZ]EditReplyQuoteQuick Reply#696512 -11/20/05 10:15 PMQuote:Hi Kenny,This is maybe the 4th or 5th binocular now that I have seen this. It is notthe worst, but to me it is very noticable. In my opinion, it should not bepresent at all. I have many fine binoculars that don't show this off-centeranomoly. I am as curious as you as to why this might occur!edzThis type of problem could be the result of an incomplete collimation processduring end-control. They are checking whether both optical paths areparallel. If one of the prisms is mounted incorrectly, so that a small tiltremains, then, during collimation, they are tilting the second prism in exactlythe same manner. Both optical paths are parallel now, but the images areslightly out of center. At high magnifications some coma might show up then(perhaps visible with a booster?), but at 7x these effects may remaininvisible.Maybe, Bill Cook knows more about what could be going wrong here.Best,HolgerPost Extras:brocknrollersageRe: WilliamOptics 7x50 EDbinocularminireview[Re: Rick]EditReplyQuoteQuick Reply#696703 -11/21/05 01:03 AMReged: 10/16/03Posts: 493Loc: Cloudy Valley,PAhttp://www.cloudynights.com/ubbthreads/showflat.php/Cat/0...mber/694293/page/0/view/collapsed/sb/5/o/all/fpart/1/vc/1 (19 of 22)2006/4/26 •• 04:44:56