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#1
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Nikon Offers Real Glass Filters
On Jun 2, 2017, RichA wrote
(in ): On Friday, 2 June 2017 17:20:21 UTC-4, newshound wrote: On 6/2/2017 7:46 AM, RichA wrote: On Thursday, 1 June 2017 22:36:26 UTC-4, android wrote: Nada plastic! Via NR: https://nikonrumors.com/2017/06/01/n...rest-high-perf ormance-protection-filters.aspx/ Or: http://tinyurl.com/ydegy4vg -- teleportation kills The test (two of them stuck together under monochromatic light) on the Japanese page is odd. Two flat surfaces (really flat) produce parallel lines. Not if you manage to get the surfaces parallel. Not "No" lines. Circles indicate lack of flatness. I'm talking about using an optical flat of know quality to check for flatness on each surface of the filter. How else would you determine plane-parallelism? Get one of these. http://tinyurl.com/y7rkj5a7 -- Regards, Savageduck |
#2
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Nikon Offers Real Glass Filters
On Jun 2, 2017, Savageduck wrote
(in iganews.com): On Jun 2, 2017, RichA wrote (in ): On Friday, 2 June 2017 17:20:21 UTC-4, newshound wrote: On 6/2/2017 7:46 AM, RichA wrote: On Thursday, 1 June 2017 22:36:26 UTC-4, android wrote: Nada plastic! Via NR: https://nikonrumors.com/2017/06/01/n...rest-high-perf ormance-protection-filters.aspx/ Or: http://tinyurl.com/ydegy4vg -- teleportation kills The test (two of them stuck together under monochromatic light) on the Japanese page is odd. Two flat surfaces (really flat) produce parallel lines. Not if you manage to get the surfaces parallel. Not "No" lines. Circles indicate lack of flatness. I'm talking about using an optical flat of know quality to check for flatness on each surface of the filter. How else would you determine plane-parallelism? Get one of these. http://tinyurl.com/y7rkj5a7 They even have digital versions; http://www.optictradelinks.com/albums1/preview_8918_DigitalClockBig.jpg -- Regards, Savageduck |
#3
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Nikon Offers Real Glass Filters
On Fri, 02 Jun 2017 18:51:24 -0700, Savageduck
wrote: On Jun 2, 2017, Savageduck wrote (in iganews.com): On Jun 2, 2017, RichA wrote (in ): On Friday, 2 June 2017 17:20:21 UTC-4, newshound wrote: On 6/2/2017 7:46 AM, RichA wrote: On Thursday, 1 June 2017 22:36:26 UTC-4, android wrote: Nada plastic! Via NR: https://nikonrumors.com/2017/06/01/n...rest-high-perf ormance-protection-filters.aspx/ Or: http://tinyurl.com/ydegy4vg -- teleportation kills The test (two of them stuck together under monochromatic light) on the Japanese page is odd. Two flat surfaces (really flat) produce parallel lines. Not if you manage to get the surfaces parallel. Not "No" lines. Circles indicate lack of flatness. I'm talking about using an optical flat of know quality to check for flatness on each surface of the filter. How else would you determine plane-parallelism? Get one of these. http://tinyurl.com/y7rkj5a7 They even have digital versions; http://www.optictradelinks.com/albums1/preview_8918_DigitalClockBig.jpg I don't these are quite up to the mark. See http://www.optimarkinstruments.com/_products__pg_2_ -- Regards, Eric Stevens |
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