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Summilux 35 V2 I Portra 160 I M7

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Hi guys, help needed here. Just saw this rainbow like stuff on the front element of my 'lux. It only comes out in a few certain angles and I believe the front element is not glue (or is it?)- but could this be lens separation or does yours look like this too? Mine is made in 1982. 

Thank you... 

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Hello gaheris,

Welcome to the Forum,

The rainbow effect seen at certain angles is caused by the light going thru the various layers of different coatings applied to the glass elements of the lens. These coatings are applied to increase the lens' transmission of light.

Today this sequential layering of different colored materials on lenses' surfaces (Sometimes spaced by clear layers in between.) is called "Muti-Coating".

When Leitz (The owner of Leica at the time.) first began doing this, before the term "Multi-Coating" was introduced: They called the process "staggered coating".

1 indication of Multi-Coating is the existence of green in the rainbow. Many types of single coatings do not create rainbows including the color green.

Best Regards,

Michael

Edited by Michael Geschlecht
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14 hours ago, Michael Geschlecht said:

Hello gaheris,

Welcome to the Forum,

The rainbow effect seen at certain angles is caused by the light going thru the various layers of different coatings applied to the glass elements of the lens. These coatings are applied to increase the lens' transmission of light.

Today this sequential layering of different colored materials on lenses' surfaces (Sometimes spaced by clear layers in between.) is called "Muti-Coating".

When Leitz (The owner of Leica at the time.) first began doing this, before the term "Multi-Coating" was introduced: They called the process "staggered coating".

1 indication of Multi-Coating is the existence of green in the rainbow. Many types of single coatings do not create rainbows including the color green.

Best Regards,

Michael

Thank you so much for your explanation Michael! I realised this is perfectly fine as this seems to only create this rainbow effect when the lights from a computer screen hit the lens. Surely not separation or anything dodgy. It was my first time seeing it so I was a bit surprised. 

Took my my lux to the street today and oh my, am I happy... 
 

 

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Pre-ASPH v2, M10-P

 

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M10, 35mm Summilux pre-ASPH v2

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M10, 35mm Summilux pre-ASPH v2

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