Hallo. In eure Beschreibung steht "...Präzisionsoptik mit Fluorit-Linsen". Es gibt anscheinend ein Missverständnis, denn in bekannte FotoSeite "DPreview", wurde wie folgt kommentiert, Zitat:

"It's a fluori-ne coating, not a fluori-te element. This means that the glass is treated with a fluorine-based chemical that affixes itself to the surface, and acts as a stain repellent. It's got literally nothing to do with fluorite crystals, except for the actual fluoride atoms present in both." und,

"I inquired on Quora, as to what a "fluorine coating" means. It's a marketing term for Teflon."

Also, was sagt Digitec, bzw Canon.ch?

Question

Hallo. In eure Beschreibung steht "...Präzisionsoptik mit Fluorit-Linsen". Es gibt anscheinend ein Missverständnis, denn in bekannte FotoSeite "DPreview", wurde wie folgt kommentiert, Zitat:

"It's a fluori-ne coating, not a fluori-te element. This means that the glass is treated with a fluorine-based chemical that affixes itself to the surface, and acts as a stain repellent. It's got literally nothing to do with fluorite crystals, except for the actual fluoride atoms present in both." und,

"I inquired on Quora, as to what a "fluorine coating" means. It's a marketing term for Teflon."

Also, was sagt Digitec, bzw Canon.ch?

Answer

This is effectively called fluorine coating in German. However, I'm not quite sure if it doesn't still have fluorite elements on/in the camera and not just on the lens itself as a dirt and water repellent. After all, one would not define a lens by a coating, but rather by its function.

Quote:

A fluorine coating reduces the adhesion of dirt and water droplets to the front and rear lens. 

The EF 70-200mm f/4L IS II USM's fluorite lens elements correct chromatic aberrations and ensure high resolution with high-contrast colours.

Siehe: https://de.canon.ch/images/20180607_pressrelease_70-200mm_de_final_tcm88-1682633.pdf

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Question about Canon EF 70-200mm f/4L IS II USM