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Interesting - sensor clip-on filter

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stenrasmussen:
Just saw this:
http://nikonrumors.com/2016/12/22/light-pollution-clip-on-filter-for-full-frame-nikon-dslr-cameras.aspx/

bobfriedman:
i read it also.. but they don't tell you what the B270 glass is coated with??.. spectrum would be helpful. I take it back.. Spectrum is here.

https://www.cyclopsoptics.com/filters/stc-astro-multispectra-clip-filter-nikon-full-frame/

also A2 tool steel is not stainless and will rust if not cared for... .of course, not much moisture in the mirror box

Bjørn Rørslett:
The technique for attaching the filter is the same procedure as used for non-retrofocus fisheye lenses ...

Hugh_3170:
It appears that STC in Taiwan have now produced similar filters for the Nikon-Z FX format cameras:  https://dc.watch.impress.co.jp/docs/news/1313459.html

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