Canon BR "organic optical material with anamalous dispersion"

LaszloBencze

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OK now that we know that the great advance for the new Canon 35mm f1.4 lens is "organic optical material with anamalous dispersion" can any of you tech heads here explain what this is? It is a completely new concept to me and I suspect to most everybody who frequents this site.

Is it a liquid? A plastic? A glasslike material? What might it be made of?
 
"anomalous"

They say it's an organic material, which probably means it's some kind of plastic. I guess they chose to say "organic" because "plastic lens" has lots of bad connotations.

Interesting that this new BR compound is sandwiched between two glass elements - maybe it's not strong enough structurally to be used on its own? Having different materials bonded together isn't new, though - lenses have been using bonded elements for quite some time.

What do they mean by anomalous dispersion? Probably that it bends short wavelengths more than long wavelengths. Ordinary glass bends longer wavelengths more, which is the source of chromatic aberrations and colour fringing.

Their description in the press release makes it sound like it only bends blue light - that's either absurd, or outright weird :)

If you haven't read the Canon release: http://www.canon.com/news/2015/aug27e.html
 
"anomalous"

They say it's an organic material, which probably means it's some kind of plastic. I guess they chose to say "organic" because "plastic lens" has lots of bad connotations.
I suspect you're correct on this point. Although I confess I was imagining something made of shark cartilage or bamboo.
Interesting that this new BR compound is sandwiched between two glass elements - maybe it's not strong enough structurally to be used on its own? Having different materials bonded together isn't new, though - lenses have been using bonded elements for quite some time.
Very true although the bonding in doublets is achieved with glue. In the Canon diagram it appears that the organic material bonds on its own with no need for adhesive. Canon will have to offer a more detailed explanation.
What do they mean by anomalous dispersion? Probably that it bends short wavelengths more than long wavelengths. Ordinary glass bends longer wavelengths more, which is the source of chromatic aberrations and colour fringing.
You may be right, although I thought the term referred to having different refractive characteristics within the material itself; i. e., that the center of that element would refract differently from the edges.
Their description in the press release makes it sound like it only bends blue light - that's either absurd, or outright weird :)
Agreed. It would have some refractive effect on all wavelengths but perhaps much more on blue light.
If you haven't read the Canon release: http://www.canon.com/news/2015/aug27e.html
 
I suspect the element is sandwiched between two glass elements to protect its shape and to keep it from sublimating.
 
Is it a liquid?
Probably. They use the term Organic, because it has some carbon atoms in <whatever it is>.
A plastic? A glasslike material? What might it be made of?
Being a liquid it will sit perfectly between lenses attaining the figures on the surfaces it sits between.

Canadian Balsam has been used to glue lenses together for a century for similar reasons--no need for anti-reflecting coatings.
 
It could be the left over oil that was present in the Canon 1Dx mirror box. :-O
Touche.

I was going to say that I could smell a recall just around the corner on these lenses and masses of angry early adopters paying record prices for very little increase in image quality.
 
It could be the left over oil that was present in the Canon 1Dx mirror box. :-O
Touche.

I was going to say that I could smell a recall just around the corner on these lenses and masses of angry early adopters paying record prices for very little increase in image quality.
It's called olfactory hallucination.
 
A Canon image showing the new lens in the foreground an new lens ingredients in the background shows those ingredients as powder. If those are the actual ingredients, that would lend credence to the idea that the lenses are not liquid.

Canon cameras do, actually, already have liquid lenses. They're in the LCD panels.
 
It could be the left over oil that was present in the Canon 1Dx mirror box. :-O
Touche.

I was going to say that I could smell a recall just around the corner on these lenses and masses of angry early adopters paying record prices for very little increase in image quality.
Interesting that some of us criticise Canon for not being innovative enough and yet when they do something interesting we criticise them for that as well.

Who would choose to be a manufacturer with us lot?
 
It could be the left over oil that was present in the Canon 1Dx mirror box. :-O
Touche.

I was going to say that I could smell a recall just around the corner on these lenses and masses of angry early adopters paying record prices for very little increase in image quality.
Interesting that some of us criticise Canon for not being innovative enough and yet when they do something interesting we criticise them for that as well.

Who would choose to be a manufacturer with us lot?
It's joking on my part. I bought the 1Dx knowing about the "oil leaks". If I was interested in the new 35Lii I would buy it even if "BR" leaks. I have owned Canon for along time, back with the F1's/AE-1. I don't plan to change this time in my life. They do an excellent job for my needs.
 
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It could be the left over oil that was present in the Canon 1Dx mirror box. :-O
Touche.

I was going to say that I could smell a recall just around the corner on these lenses and masses of angry early adopters paying record prices for very little increase in image quality.
Interesting that some of us criticise Canon for not being innovative enough and yet when they do something interesting we criticise them for that as well.

Who would choose to be a manufacturer with us lot?
It's joking on my part. I bought the 1Dx knowing about the "oil leaks". If I was interested in the new 35Lii I would buy it even if "BR" leaks. I have owned Canon for along time, back with the F1's/AE-1. I don't plan to change this time in my life. They do an excellent job for my needs.
Customers have the right to be demanding. SPurs innovation.
 

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