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Gorilla glass vs. sapphire glass


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22 replies to this topic

#1 martha

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Posted 02 January 2013 - 14:41

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(I am not sure if this questions goes here or elsewhere, but....)

Can someone reference a link to relative merits of Gorilla glass versus sapphire glass. I will also be happy to hear folks' opinions of relative merit of each.

Thanks in advance.

--martha

#2 LucisPictor

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Posted 02 January 2013 - 14:43

I don't know a lot about Gorilla glas, but I know that Sapphire glas, although very scratch resistant, breaks rather easily when under influence of vertical pressure.
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-----
Carsten ...

Womit ich fotografiere? Mit einigen Sachen mit 'nem roten Punkt und mit vielen anderen Sachen auch. ;)

Schaut doch mal in meinen Blog: RetroCamera.de
Dort verkaufe ich auch immer mal wieder ein paar Sachen...

#3 Tonki-M

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Posted 02 January 2013 - 15:29

Gorilla is basically a cheaper sapphire glass. i'm no expert in LCD glass by any means, mind you. Gorilla glass is being used on today's modern phones like the iPhone 5. it offers good scratch resistance, but not nearly as indestructible as the sapphire.
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#4 lct

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Posted 02 January 2013 - 15:50

Fun with Gorilla Glass - YouTube
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#5 MichaelRabern

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Posted 03 January 2013 - 06:34

I cannot find much on this, but what glass is on the M-E? (I am thinking ordering one as a backup)
V/r

Michael

#6 Tonki-M

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Posted 03 January 2013 - 06:39

M-E is exactly like the M9 w/o framline lever and USB socket, so the same easily scratchable, not-so-shiny glass.
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#7 marknorton

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Posted 03 January 2013 - 06:48

Not even glass, some sort of plastic, probably polycarbonate. The view of the M9 low res screen is much clearer through sapphire glass.

I think using gorilla glass is a sensible compromise between cost and performance.
Mark

#8 taosantamonica

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Posted 03 January 2013 - 08:03

I think the reformulated schott glass giottos started using on their protectors last year is a little stronger formula than the gorilla formula. I have a giottos on my nex 7 and it’s been great for a year now with no problems except finger prints which are quickly taken care with a lens microfiber cloth. I’ve only had the sapphire m9p for a couple of months but it seems to be excellent protection..... and i didn't have to worry about getting it on straight :)

#9 iedei

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Posted 03 January 2013 - 11:56

Sapphire crystal is MUCH more expensive to manufacture....at least 10-20 times more expensive than Gorilla glass. in terms of useability----Gorilla glass is essentially a coated glass which rivals Sapphire in terms of hardness and scratch/break resistance. Both are a huge improvement over the otherwise el cheapo plastic screen cover used in regular camera screens.

I love the sapphire screen on my updated M8. easy to clean and never any scratches.
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#10 martha

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Posted 03 January 2013 - 15:03

I cannot find much on this, but what glass is on the M-E? (I am thinking ordering one as a backup)


I was wondering that myself, Michael. Thanks for asking.

In anticipation of a trade for my coffee stained 8.2, I am wondering if they will offer me an M9, M9p or ME. Glasswise (and cosmetically), I certainly would prefer an M9P from what I've read here, but may not have a choice. Alas.

Thanks to all above and below for your responses to my query.
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#11 jonoslack

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Posted 03 January 2013 - 15:34

Thanks for the description Syed
Gorilla glass definitely IS scratcheable (I know, I've scratched my phone) - but it's pretty good.
I'd recommend taking more care over the screen than you need to with sapphire glass, but I don't suppose it needs babying like that nasty plastic they used to use.

all the best
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kind regards
jono slack

#12 jdlaing

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Posted 03 January 2013 - 16:41

Gorilla Glass was developed by Corning as a chemically hardened glass. The Gorilla Glass in LCD screen covers for cameras was released in 2012 by Schott AG. Schott has been a premier lens glass supplier for quite some time.

Sapphire Glass is a laboratory grown artificial sapphire crystal glass.

The cost of sapphire over Gorilla glass is roughly 5 times as expensive for the size of what is used in LCD covers and cell phones like the iPhone.

The bigger the piece of glass the more the cost of sapphire. Sapphire glass became most common in watch crystals.

Sapphire glass is much more scratch resistant than Gorilla glass but much more brittle and has less tensile strength.


These panels are covered in Schott Glass in something between sapphire and Gorilla glass and are a large part of the cost of each panel well over $1,000 per panel. They withstand hail and other flying debris to a degree. iPhone and MacBook screens are Corning products, if I recall.

http://www.pbase.com...image/140096775

Edited by jdlaing, 03 January 2013 - 16:47.

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#13 billo101

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Posted 03 January 2013 - 17:01

Gorilla glass is on M?
Sapphire glass is on MM?

#14 iedei

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Posted 03 January 2013 - 17:07

The cost of sapphire over Gorilla glass is roughly 5 times as expensive for the size of what is used in LCD covers and cell phones like the iPhone.

The bigger the piece of glass the more the cost of sapphire. Sapphire glass became most common in watch crystals.


i have a friend who is a watch maker....the cost of Sapphire is MUCH, MUCH more than Gorilla glass......i've been told at least 20 times more, if not more than that.
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#15 taosantamonica

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Posted 04 January 2013 - 11:11

The Gorilla Glass in LCD screen covers for cameras was released in 2012 by Schott AG. Schott has been a premier lens glass supplier for quite some time.


schott released it's xensation formula in 2012 but it's not associated with corning's gorilla lcd covers. giottos uses it in its camera lcd covers though.

#16 tadeyev

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Posted 04 January 2013 - 15:50

The sapphire glass used by Leica used to be made by Stettler in Switzerland, who are the premier suppliers (about 89%) for the entire Swiss watch industry, including Patek Philippe, Rolex and many others.

The material itself is fairly expensive, but what people do not normally realise is the cost of manufacturing is very high. Although the sapphire can be cut into slabs, it requires many hours of grinding and polishing, followed by chamfering of edges etc. In fact the production costs far outweigh the material costs. This is why it is so expensive.

In fact, the process used to create the Leica sapphire backs is very similar to some of the processes required in lens manufacturing.

Although indeed brittle, it can take quite a beating before cracking, as the thickness used by Leica is not skimpy. Anyway, this is not an issue in my view; if the sapphire glass has broken, then I am pretty sure the casing of the camera and the viewfinder are totally messed up too !!

It was too expensive to make and Leica chose, rightly or wrongly, a cheaper alternative that although fairly tough, does not have the scratch resistance of 9 Moh/s that sapphire has…
Ciao tutti,
Theo

Edited by tadeyev, 04 January 2013 - 16:47.

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#17 gabriel

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Posted 06 April 2013 - 17:30

See You tube Truth About Gorilla Glass (Ultimate Galaxy SIII Destruction!!!) *REPAIR VIDEO IN DESCRIPTION!!!* - YouTube for tests on gorilla glass 2 on Samsung Galaxy 3 phone

#18 RobertJRB

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Posted 06 April 2013 - 19:43

Gorilla glass is on M?
Sapphire glass is on MM?


Plastic:
Leica M8
Leica M9
Leica ME

Gorilla:
Leica M

Sapphire:
Leica M8.2
Leica M9P
Leica MM

I'm happy with the sapphire screen of my M9P, but had no problems with the M8's plastic screen either.
Leica M

#19 George Furst

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Posted 07 April 2013 - 09:51

If you don't mind a little technical jargen let me add a few facts about saphire. I used to do research synthesizing saphire and the method for manufacturing saphire is called the Verneuil method and is a rather slow process. The growing crystal is called a brule and it takes weeks to make a large crystal and requires very high temperatures. The crystal grows by a process of pulling and requires very expensive equipment that consumes a great deal of energy. As someone mentioned, it has a hardness of 9. This means that it is harder than topaz and not as hard as diamond. It is made of aluminum oxide and is commonly called corundum. It also has a specific gravity of 4, meaning it is four times heavier than water. It also has an index of refraction of 1.77. All of this means that it is one of the hardest materials know to man! I am really amazed that they can make the cover for the M9p as that is a large chunk of crystal. We used to cut it using very expensive diamond says and then polish it using diamond paste. It's great weakness is it is very brittle. Because of this one must be careful not to have a sharp object hit the screen as it will break. I always cover mine with a small plastic film screen to absorb the shock.
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#20 xardas

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Posted 02 July 2013 - 14:37

Plastic:
Leica M8
Leica M9
Leica ME

Gorilla:
Leica M

Sapphire:
Leica M8.2
Leica M9P
Leica MM

I'm happy with the sapphire screen of my M9P, but had no problems with the M8's plastic screen either.


I just had a talk with someone from reddotcameras.co.uk and they say that the ME is actually Gorilla glass.

Gorilla or not i guess i will still buy some protector for the screen.




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