Various coating in the same binoculars (1 Viewer)

[mnich]

I noticed that in some copies of Zeiss binoculars - within the same model, only in different vintage years of production, there are different types of coatings on lenses or ocular lens, in the same binoculars ...
I wondered what it's for, it can improve the 3D effect? Or perhaps lacked just the same lenses and lens replacement was put .... :0)
If anyone knows about this?





in the second picture from the top, in one eyepiece is a reflection of a slightly greenish, what is not in the second, both lenses are not so different as shown in this picture, I put under such account to show the greenish reflection.






Pictures do not reflect fully the phenomenon, of course I know that looking at various account changes colors.
The last two pictures show the left and right eyepiece same set of binoculars up to the light so as to achieve maximum color saturation. As you can see, both are different.

P.S.
binoculars are not repaired, but a new, bought in stores

 

[Troubador]

The Zeiss T* coating is subject to a programme of continuous improvement although I have no idea how often the coating is actually changed.

For example at this time Nicholas Benoit at Zeiss Wetzlar is responsible for improvements of T*, and I am sure there has always been such a person.

Lee

 

[Binastro]

I think that mnich may mean that in one example of a binocular the different barrels have different colour coatings. This is in the objectives, the eyepieces or both.
This is almost normal in Soviet and Russian binoculars and almost certainly means that the coating occurs in batches more or less handmade one batch at a time. When the binoculars are hand assembled it is clear that components are selected from different batches. This may be to match focal lengths or just be random.

I presume that with Zeiss the same thing has occurred although I have not seen it myself.
With modern automated machinery the coating seem to be very consistent even if it is not of high quality.

I haven't really noticed much difference in the view in different barrels with Russian binoculars, but I suppose if I looked hard I might see it.

I have an old Swarovski Porro prism binocular that had fungus and was overhauled. This necessitated more or less removing the coatings from one barrel, and the image colour differences are profound.

 

[perterra]

I think that mnich may mean that in one example of a binocular the different barrels have different colour coatings. This is in the objectives, the eyepieces or both.
This is almost normal in Soviet and Russian binoculars and almost certainly means that the coating occurs in batches more or less handmade one batch at a time. When the binoculars are hand assembled it is clear that components are selected from different batches. This may be to match focal lengths or just be random.

I presume that with Zeiss the same thing has occurred although I have not seen it myself.
With modern automated machinery the coating seem to be very consistent even if it is not of high quality.

I haven't really noticed much difference in the view in different barrels with Russian binoculars, but I suppose if I looked hard I might see it.

I have an old Swarovski Porro prism binocular that had fungus and was overhauled. This necessitated more or less removing the coatings from one barrel, and the image colour differences are profound.

I read it as different coatings for different years?

 

[Binastro]

. Hi perterra,
I am not sure what mnich meant.
The second photograph from the top seems to show different colour objective coatings, but this may be just the angle.

There are definitely differences in coatings in different year models for Zeiss binoculars and in fact with other manufacturers also, as coating advances.

 

[henry link]

I've noticed the very same change in the reflection colors between early and later FLs. I don't find the later ones to be improved. Later FLs appear to have a stronger green color bias compared to early ones. See this post:

http://www.birdforum.net/showpost.php?p=1391340&postcount=30

Is the top binocular in the photo Lotutec coated? I've never seen a non-Lotutec coated FL with reflection colors like the bottom binocular or a Lotutec coated FL with reflection colors like the top one, but that could be because I've haven't seen enough of them.

 

[mnich]

dear colleagues, if I was misunderstood I apologize, I'm still working on my English

Hello Henry,
the picture at the top is the Zeiss 7x45 DS 1996 and it also occurs the effect that a single lens inside the lens on the right side has a greenish color, the same single lens in the lens of the left, color is slightly pink.

Being in the shops of optics binoculars sometimes I come across with similar ailments.

 

[henry link]

I'll put up some photos of my early and later FLs when I get a chance. The reflection colors in my early one from 2004 looks closer to your 7x45 than it does to my later FL from 2007, which looks just like your lower photo.

 

[perterra]

dear colleagues, if I was misunderstood I apologize, I'm still working on my English

Hello Henry,
the picture at the top is the Zeiss 7x45 DS 1996 and it also occurs the effect that a single lens inside the lens on the right side has a greenish color, the same single lens in the lens of the left, color is slightly pink.

Being in the shops of optics binoculars sometimes I come across with similar ailments.

Dont sweat it, I was born and raised here and I'm still working on my English as well. :-O

 

[garymh]

Hi,

In the coating process chemical elements are vaporised onto the lenses at a certain pressure and temperature.

Although the amounts of chemicals are measured exactly the slightest difference in pressure or temperature at the moment of vaporisation will result in a slightly different colour coating.

When assembling or repairing binoculars we try to use lenses from the same coating batch or pick colours that match - but sometimes a rogue slips through.

It will not affect the optical performance in any way.

 

[Binastro]

Thanks Gary,
That's what I thought.

 

[mnich]

Hi,

In the coating process chemical elements are vaporised onto the lenses at a certain pressure and temperature.

Although the amounts of chemicals are measured exactly the slightest difference in pressure or temperature at the moment of vaporisation will result in a slightly different colour coating.

When assembling or repairing binoculars we try to use lenses from the same coating batch or pick colours that match - but sometimes a rogue slips through.

It will not affect the optical performance in any way.

Hello Gary,

Thank you for your explanation, I confirm that I have not noticed differences in normal viewing through binoculars between one and the other viewing tube

 

[mnich]

Here better able to show a phenomenon where the right side of the lens reflects light green, on the left side of the same lens reflects violet