ceramic lens in digital cameras

aniramca RemoveThis @yahoo.com wrote:
> Casio introduced a transparent ceramic lens in their Exilim line
> camera, model EX-S100 a few years ago. Has the ceramic lens been used
> in other Casio's digital cameras? What about other digital camera
> manufacturers? Will ceramic lenses eventually compete with glass
> lenses? Will we see Nikkor and Canon lenses made of ceramic in the
> near future? Or, do ceramic lenses only compete in small size lenses
> (small digital cameras like the exilim line) ?
> For those who own the Exilim Ex-S100, what kind of picture quality
> that is obtained from this camera?
> Thanks for info.
>
I may be misunderstanding something but isn't glass a non-crystalline
ceramic?

I suspect that Casio simply thought it worth mentioning that their
lenses were galss rather than plastic as is commonly found on cheap cameras.
 >> Stay informed about: ceramic lens in digital cameras 

"Rita Ä Berkowitz" <ritaberk2O04 @aol.com> schrieb im Newsbeitrag
news:12rpsfarjb6193e@news.supernews.com...
>
> The only place were transparent ceramics is acceptably used in is electric
> cooktops. There's no place for this material in optics.
>
> Rita

Thanks for the highly qualified comment. Could you elaborate if I am right
that calcium fluoride is good for teeth only?

>
 >> Stay informed about: ceramic lens in digital cameras 

"Cgiorgio" <me RemoveThis @nowhere.org>

> "Rita Ä Berkowitz"
>> The only place were transparent ceramics is acceptably used in is
>> electric cooktops. There's no place for this material in optics.
>> Rita

> Thanks for the highly qualified comment. Could you elaborate if I am right
> that calcium fluoride is good for teeth only?

I understand your sarcasm. She should forward this question to the guys
created Canon GL2 using these lenses

Just D.
 >> Stay informed about: ceramic lens in digital cameras 

On Sun, 28 Jan 2007 20:08:07 +0100, Cgiorgio wrote:

>> The only place were transparent ceramics is acceptably used in is electric
>> cooktops. There's no place for this material in optics.
>>
>> Rita
>
> Thanks for the highly qualified comment. Could you elaborate if I am right
> that calcium fluoride is good for teeth only?

Don't mind Rita. She's known for her many crockpot statements.
 >> Stay informed about: ceramic lens in digital cameras 

Cgiorgio wrote:
> "Rita Ä Berkowitz" <ritaberk2O04 @aol.com> schrieb im Newsbeitrag
> news:12rpsfarjb6193e@news.supernews.com...
>> The only place were transparent ceramics is acceptably used in is electric
>> cooktops. There's no place for this material in optics.
>>
>> Rita
>
> Thanks for the highly qualified comment. Could you elaborate if I am right
> that calcium fluoride is good for teeth only?
>

Maybe Rita knows more about cooktops than optics.
 >> Stay informed about: ceramic lens in digital cameras 

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 >> Stay informed about: ceramic lens in digital cameras 

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 >> Stay informed about: ceramic lens in digital cameras 

Richard Polhill wrote:
> aniramca.DeleteThis@yahoo.com wrote:
>
>> Casio introduced a transparent ceramic lens in their Exilim line
>> camera, model EX-S100 a few years ago. Has the ceramic lens been used
>> in other Casio's digital cameras? What about other digital camera
>> manufacturers? Will ceramic lenses eventually compete with glass
>> lenses? Will we see Nikkor and Canon lenses made of ceramic in the
>> near future? Or, do ceramic lenses only compete in small size lenses
>> (small digital cameras like the exilim line) ?
>> For those who own the Exilim Ex-S100, what kind of picture quality
>> that is obtained from this camera?
>> Thanks for info.
>>
> I may be misunderstanding something but isn't glass a non-crystalline
> ceramic?
>
> I suspect that Casio simply thought it worth mentioning that their
> lenses were galss rather than plastic as is commonly found on cheap
> cameras.

Ah I've looked it up: the lenses were made from Lumicera:-

http://en.wikipedia.org/wiki/Lumicera


Apparently it has a very high refractive index compared to glass.
 >> Stay informed about: ceramic lens in digital cameras 

"Rita Ä Berkowitz"

>> I understand your sarcasm. She should forward this question to the
>> guys created Canon GL2 using these lenses
>
> THANKS! You just solved one of the greatest mysteries in the photography
> world if you are correct. Do they use ceramic lens elements in the Canon
> 16-35/2.8? This would be a logical conclusion since glass wouldn't yield
> so
> much light falloff in the corners.

Maybe you're not aware that this camcorder was created about or even more
than 3 years ago At least I bought it at that time. In my mind that's the
best semipro camcorder that you can buy. But that's not the subj of this NG.
If it's interesting just take a closer look.

http://www.usa.canon.com/consumer/controller?act=ModelDetailAct&fcateg...id=165&

> Rita

Just D.
 >> Stay informed about: ceramic lens in digital cameras 

Sorry, forgot to mention in my previous post that this camcorder has 30X
optical zoom, isn't that impressive?

"Just D" <no.RemoveThis@spam.please> wrote in message
news:rkbvh.5185$pH3.4213@newsfe12.phx...
> "Rita Ä Berkowitz"
>
>>> I understand your sarcasm. She should forward this question to the
>>> guys created Canon GL2 using these lenses
>>
>> THANKS! You just solved one of the greatest mysteries in the photography
>> world if you are correct. Do they use ceramic lens elements in the Canon
>> 16-35/2.8? This would be a logical conclusion since glass wouldn't yield
>> so
>> much light falloff in the corners.
>
> Maybe you're not aware that this camcorder was created about or even more
> than 3 years ago At least I bought it at that time. In my mind that's
> the best semipro camcorder that you can buy. But that's not the subj of
> this NG. If it's interesting just take a closer look.
>
> http://www.usa.canon.com/consumer/controller?act=ModelDetailAct&fcateg...id=165&
>
>> Rita
>
> Just D.
>
>
 >> Stay informed about: ceramic lens in digital cameras 

"Alfred Molon"
> Is calcium fluoride a ceramic? AFAIK a ceramic is a mixture of different
> powders compressed at high temperatures or something similar, in any
> case not something consisting of just one substance. But feel free to
> correct me if I'm mistaken.

Maybe you're right, lets anybody who knows for sure answer. Probably it's
just the game of the names, terminology, nothing else. Its noticed if you
call some low quality stuff like EXTRA TRI-PLUS and people will buy it
immediately, regardless of what's that, tooth paste or some cheap chemical
against cockroaches. I just know that fluorite is a mineral having the
formula CaF2. It's a well-known, very soft mineral of cubic singony, you
can scratch it with your nail if you want. Maybe artificial crystals should
be grown up using some mixes kept for a long time under high pressure and
temperature, I don't know the technology. I'm just absolutely sure that it's
almost impossible to use the natural crystals for that purpose of the great
number of cracks, scratches, etc. I'm writing as a person having the very
first education as the master in geology in the past.

Just D.
 >> Stay informed about: ceramic lens in digital cameras 

"Rita Ä Berkowitz" <ritaberk2O04 @aol.com> schrieb im Newsbeitrag
news:12rq72f4l6oh3dc@news.supernews.com...

> THANKS! You just solved one of the greatest mysteries in the photography
> world if you are correct. Do they use ceramic lens elements in the Canon
> 16-35/2.8? This would be a logical conclusion since glass wouldn't yield
> so
> much light falloff in the corners.
>

>
> Rita
>
Light falloff because of calcium fluorite lenses - that must be the reason
they have to step these small 12" silicon wafers under their projectors
instead of exposing them all at once. Thank you once again for your
competent comment.
 >> Stay informed about: ceramic lens in digital cameras 

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