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

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

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