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therod82
 Post subject: Crystal Question
PostPosted: Tue May 13, 2008 7:38 am 
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Ok, why do certain Breitlings, like my Navitimer, have a slightly domed crystal shape while others, like my B1 have a flat crystal? Is there a reason for the domed crystal besides just looking cool when you view it at an angle? :)

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Dave
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kenseymour
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PostPosted: Tue May 13, 2008 7:51 am 
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Hi Dave!

Welcome to the forum!

I'm pretty new here myself and also the proud owner of a navi!! :) To answer your question about the dome crystal - The reason it's that way is to permit the wearer to view the dial at almost any angle. If it were flat, the viewing angle would be reduced and the fine detail around the sliding bezel would not be as easily visible. Hope this answers your question. If not, there are some really knowlageable folks in here (not me!!) who would be happy to help out.

Regards,

Ken

PS - Post some pics of your navi - they're always welcome!! :)

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doctor diesel
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PostPosted: Tue May 13, 2008 7:58 am 
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The navi has a large area crystal with relatively thin sapphire, the doming of it adds strength, hence the slight doming of the superocean etc (for strength also)

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kenseymour
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PostPosted: Tue May 13, 2008 8:01 am 
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Hey doc!

Am i correct about the visibility factor??

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doctor diesel
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PostPosted: Tue May 13, 2008 8:11 am 
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Having a curved crystal will distort the periphery if not looked at straight-on, so therefore are you wrong??...not really but it depends on whether the crystal curvature radius is the same on the inside as outside.....I'm wearing my SO coral today and it has a more convex surface than concave inner side so acts a bit like a magnifying lens!, at extreme angles of view, it all gets a bit psychadelic, especially with a coral dial :lol: :lol: :lol:

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Flynbyu
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PostPosted: Tue May 13, 2008 8:19 am 
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Good question.

I would think it would be for aerodynamic reasons.

:lol:

~Brian

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doctor diesel
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PostPosted: Tue May 13, 2008 8:23 am 
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Flynbyu wrote:
Good question.

I would think it would be for aerodynamic reasons.

:lol:

~Brian


ahh, but the navitimer is not suitable for swimming with so that buggers up that theory :wink: :wink: :wink: :wink: :lol: :lol: :lol: :lol: :lol:

oops, that would be hydrodynamic!

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kenseymour
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PostPosted: Tue May 13, 2008 8:40 am 
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I can imagine!! anything with coral would be a little psycadelic!! No offence doc, I think the coral with SS is cool. :)

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doctor diesel
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PostPosted: Tue May 13, 2008 8:46 am 
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Aye, :wink: us coral club boys are trendsetters not trend followers!

think shepherd rather than sheep! :lol: :lol: :lol:

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Driver8
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PostPosted: Tue May 13, 2008 9:58 am 
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The sapphire is cambered (or convex) to both increase strength and it also helps to reduce reflections still further.

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Last edited by Driver8 on Tue May 13, 2008 10:35 am, edited 1 time in total.

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therod82
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PostPosted: Tue May 13, 2008 10:05 am 
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Thanks for the responses, very informative. I'll try to post some pics soon.

Best,
Dave
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