new sort glass for protective front pane

AgX

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• Dec 17, 2015

• #1

Lately the standard UV filter as protective pane in front of the lens has got as alternative chemically hardened plain, colourless or even coloured glass.

Now a new substrate comes in use that is harder in itself: glass-ceramics.

Next year Sigma shall introduce glass-ceramic protective panes mounted in filter-thread rings

 

Mick Fagan

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• Dec 17, 2015

• #2

Would be a Schott Glass product in conjunction with Sigma?

Mick.

 

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AgX

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• Dec 17, 2015

• #3

The protector will be completely made in Japan with glass-ceramic from Ohara glassworks.

Optical grade glass-ceramic is already offered. Though I did not yet know of a photographic application.

 

Last edited by a moderator: Dec 17, 2015