Nikon upgrading its high end lenses with flourine coating

[rhythmworx]

Nikon is rumored to update its High-End lenses with Fluorine Coating, the list of lenses also includes the Nikkor 200mm f/2G ED VR II, 300mm f/2.8G ED VR II, 500mm f/4G ED VR, 600mm f/4G ED VR and 200-400mm f/4G ED VR II.

How does Fluorine Coating help you / your lenses, take a look at the video below for more details.

[ClutchClark]

Video @ 1:14 through 1:26 minutes.

What is this graph supposed to represent?

X-column is # of wipes used.

Y-column is lens cleaning angle.

The steeply descending lines of the non-Nikon lenses indicates what type of rate of change?

Thanks

[rhythmworx]

Video @ 1:14 through 1:26 minutes.

What is this graph supposed to represent?

X-column is # of wipes used.

Y-column is lens cleaning angle.

The steeply descending lines of the non-Nikon lenses indicates what type of rate of change?

Thanks

After a brief google search I have come to this conclusion.

The rate of change shows that after x amount of wipes the competitors lens coatings degrade quicker therefore the ability to repel a fluid decreases because the static contact angle of the given fluid decreases which helps it adhere to the surface. I think that's how nanotechnology coatings work, because fluids that try to adhere to the treated surface have a very high static contact angle and just run off, heres a video I dug up that is very interesting.

What is a 'static' contact angle?

A liquid droplet placed on a solid, non-absorbent surface will reach an 'equilibrium' condition where no further spreading of the droplet occurs. The contact angle reading, which is determined at this condition is the 'static' contact angle.

[ClutchClark]

Video @ 1:14 through 1:26 minutes.

What is this graph supposed to represent?

X-column is # of wipes used.

Y-column is lens cleaning angle.

The steeply descending lines of the non-Nikon lenses indicates what type of rate of change?

Thanks

After a brief google search I have come to this conclusion.

The rate of change shows that after x amount of wipes the competitors lens coatings degrade quicker therefore the ability to repel a fluid decreases because the static contact angle of the given fluid decreases which helps it adhere to the surface. I think that's how nanotechnology coatings work, because fluids that try to adhere to the treated surface have a very high static contact angle and just run off, heres a video I dug up that is very interesting.

What is a 'static' contact angle?

A liquid droplet placed on a solid, non-absorbent surface will reach an 'equilibrium' condition where no further spreading of the droplet occurs. The contact angle reading, which is determined at this condition is the 'static' contact angle.

Thank you. Following your description the graph now makes perfect sense.

[MJP]

Imagine fluorine coated windshields?