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TimeTechTalk.com > 3T Official Brand Forums > Benarus Taucheruhren/SteVral > Double dome crystal question |
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TimeTechTalk.com > 3T Official Brand Forums > Benarus Taucheruhren/SteVral > Double dome crystal question |
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| Double dome crystal question | Rating: 
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| Posted: Sat Oct 31st, 2009 04:29 pm |
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1st Post |
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GX9901 3T WIS 
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On a double dome crystal, and specifically the Moray crystal, are the domes like like this: () or this: (( ? Thanks!
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| Posted: Sat Oct 31st, 2009 05:58 pm |
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2nd Post |
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oagaspar Site Founder 
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double domed means convexed on both faces, rather than flat underside and curved top...so it would be ( hand6.gif
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| Posted: Sat Oct 31st, 2009 11:54 pm |
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3rd Post |
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GX9901 3T WIS
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Thanks for the reply. 
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| Posted: Sun Nov 1st, 2009 10:22 am |
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4th Post |
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oagaspar Site Founder
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YW...there seems to be quite a few WIS thrown by the use of the word "double" when used in conjunction with "domed" and thinking it means 2 crystals but it is just 1 crystal that happens to be convexed or curved on both sides giving you a less distorted view of the dial rather than being curved on the exterior and flat on the opposite/inside of the crystal. hand6.gif
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| Posted: Mon Nov 2nd, 2009 12:18 pm |
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5th Post |
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stew77 Admin 
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Yep GX9901...Oscar has definitely explained it correctly.hand6.gif Double domed is definitely the )) with both sides convex at the same radius (or very close to the same radius). Think of it in terms of a standard window...the fact that the window (flat for example) is the same thickness from center to edge, all light rays that pass through the window bend the same because they are going through the same thickness of glass. The more deviation in thickness you get between the two sides as you go from center to edge of the crystal (such as a flat inner surface and curved outer surface), the more "distortion" you are going to get. The double domed design lends to act more like a flat window pane in this sense than a magnifying lens. Sorry if I have beat this to death...truly not my intent...;) ....but I agree with Oscar that it seems like many WIS get thrown by the terminology.
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| Posted: Fri Nov 6th, 2009 10:00 am |
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6th Post |
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Steve Laughlin 3T WIS 
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Here is a photo of the Moray with double dome sapphire, and a MM with just a domed glass. you can see the distortion on the MM. The double dome sappire is the most expensive for us to use.
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| Posted: Fri Nov 6th, 2009 12:08 pm |
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7th Post |
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Jeep99dad 3T WIS 
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^ Sweet comparo Steve! Thanks for posting this side by side pic! Great illustration of the benefit of the the double dome.
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| Posted: Fri Nov 6th, 2009 12:24 pm |
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8th Post |
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bigrustypig 3T WIS 
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Wow! Now I get it, Steve. Glad to see the difference on a double dome and the usual. Thankshand6.gif
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| Posted: Sat Nov 7th, 2009 12:42 am |
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9th Post |
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GX9901 3T WIS
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You guys should emphasize the double dome a little more on future watches that uses it. I knew the Magalodon had the double dome, but I had no idea what that meant until very recently. I think it's a good selling point as not many watches uses the double dome (as far as I can tell). hand6.gif Steve Laughlin wrote: Here is a photo of the Moray with double dome sapphire, and a MM with just a domed glass. you can see the distortion on the MM. The double dome sappire is the most expensive for us to use.
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| Posted: Sat Nov 7th, 2009 11:48 am |
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10th Post |
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Jeep99dad 3T WIS
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I forgot, will the Auto GMT worldiver have the DD too? Thx
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| Posted: Sat Nov 7th, 2009 01:51 pm |
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11th Post |
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DM71 3T WIS 
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If I'm not mistaken, the GMT auto has a flat sapphire hand6.gif
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