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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

The Green ghost ( Zeiss SF 8X42 ) (1 Viewer)

I see the greenish tints in Henry's photo.
It's more noticeable in the FL. It looks like there's also
a touch of yellow.

I'm going to assume FL 8x32 probably has this color bias based on the photo evidence and also since
I've noticed more than once greens are more saturated looking
through it. But, I haven't noticed a "tint" or "cast" over the image in use ever.
Whites look clean white and brilliant and all other colors look true to me.
It's just a bit on the cold side compared to other binos I compared it to.
 
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Well, it seems we are discussing here the differences in color sensitivity of the different eyes and not the color definition of the SF. I will explain:
- I do not see any green cast when I look with both eyes to a perfectly white surface.
- I do not see any green cast when holding the SF upside down above a perfectly white paper and look at that paper through the objective.
- the difference in light transmission between 500-650 nm is around 2,2%, that is for the eye not visible in my opinion as a color difference.
Gijs van Ginkel
 
Gijs van Ginkel said:
Well, it seems we are discussing here the differences in color sensitivity of the different eyes and not the color definition of the SF.
Click to expand...

I'm afraid we're going round in circles ...

Hello Gijs,

how do you explain the fact that this clear green tinge is only perceived in the SF, while it does not appear in other binoculars?

Holger Merlitz said:
I have seen that green cast with an early 10x42 SF model, when it was presented first at our optics store. I put that glass in front of my eyes and said loudly: Wow, green!

Months later, I had an opportunity to use both the 8x42 and 10x42, and neither one showed that green cast. I would guess that was a glitch that occurred only with a couple of early production units.
Click to expand...

I also said "wow green" loudly when I looked at the fog...

I think just like Holger, there are still a few "green" SF floating around while Zeiss has tacitly fixed this problem.

Andreas
 
Andreas, post 65,
The only way it could be explained (by me at least) is that there are differences between early and later SF's or that quality control by Zeiss was not of continuous top quality, something I can hardly believe from what I have seen in the Zeiss factory.
Gijs van Ginkel
 
Andreas, post 65,
It would be useful if you could look through more samples of the SF, besides the one in your possession.

-Bill
 
Most of the SV's I've looked through look very blue compared to my HT - but I'm not going to say all SV's are blue-biased nor am I going to contend that what I see is what everyone else will see...
 
james holdsworth said:
Most of the SV's I've looked through look very blue compared to my HT - but I'm not going to say all SV's are blue-biased nor am I going to contend that what I see is what everyone else will see...
Click to expand...

The first time I looked through the 10x42 EL from a friend, I was stunned, how cold/blue it was. But I never got this impression by other Swarovski binos, I used since.
 
wdc said:
Andreas, post 65,
It would be useful if you could look through more samples of the SF, besides the one in your possession.

-Bill
Click to expand...

Bill, I saw through another SF with a very close serial number that same green...but ... what about Mr. Merlitz's statement, he looked through several SF and found the following ...???

Holger Merlitz said:
I put that glass in front of my eyes and said loudly: Wow, green!

Months later, I had an opportunity to use both the 8x42 and 10x42, and neither one showed that green cast.
Click to expand...

Andreas
 
Gijs van Ginkel said:
Andreas, post 65,
The only way it could be explained (by me at least) is that there are differences between early and later SF's or that quality control by Zeiss was not of continuous top quality, something I can hardly believe from what I have seen in the Zeiss factory.
Gijs van Ginkel
Click to expand...

I'm not convinced by Zeiss's quality control, my SF's have a lot of internal dust visible.
 
Conndomat said:
Bill, I saw through another SF with a very close serial number that same green...but ... what about Mr. Merlitz's statement, he looked through several SF and found the following ...???

Andreas
Click to expand...

He looked through several SFs? Read the quotation Andreas.

He looked through 1 and saw green then later looked through 2 and did not see green. That is a total of 3 which really isn't ''several''. And if you refer to the SFs that he thought were green to support your case, then it was 1 (one).

Nobody is doubting what you saw Andreas, everyone is simply describing what they saw.

Lee
 
Gijs van Ginkel said:
The only way it could be explained (by me at least) is that there are differences between early and later SF's or that quality control by Zeiss was not of continuous top quality, something I can hardly believe from what I have seen in the Zeiss factory.
Click to expand...

I also have no clear explanation Gijs...I will do the paper test tomorrow for security...;)

Andreas
 
Making a serviceable photo of the color bias is not hard, even with a phone camera. Below I just leaned a white foam board against an outside wall on a cloudy day (just now) and lined up the binocular in front. The only refinement I used is the tripod mounting so I wouldn't have to fumble around with the phone in one hand and the binocular in the other, but with some patience it can be done hand held. Phone photos done just a casually as this one should show the color bias, if there is any.
 

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I am 68 yrs. I scored 2 wearing up close glasses.
With out glasses Left eye I can see up close right eye I can not read computer screen at normal distance left eye I can read screen with out glasses. ;) I did not try closing one eye etc. for test. Also did not do test for a long time etc. As far as the green bias goes I would rather test looking with any binocular. I would think there could be a problem with computer/ monitor etc. I am not going to say what I think about the picture post #76
 
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Conndomat said:
I also have no clear explanation Gijs...I will do the paper test tomorrow for security...;)

Andreas
Click to expand...

Maybe you should talk with Gijs to see what would be needed for him to do the same work on your SF as he has in others. Maybe there is some sort of difference with yours.

Maybe someone with the proper knowledge could suggest some sort of comparative eye test for green and non green image types. Maybe there is some physiological basis.

Since it is clear some see green, there has to be some reason. It is also pretty clear that just because some see green, that is not a sign there is a fault, or that everyone should see it too. The opposite applies.
 
Troubador said:
He looked through 1 and saw green then later looked through 2 and did not see green. That is a total of 3 which really isn't ''several''.
Click to expand...

Lee, now you're going to sophistry...

Recently a neighbor told me about a family with several children ... when asked how many there were he said three...;)

Bill's original statement was this one ...
wdc said:
It would be useful if you could look through more samples of the SF, besides the one in your possession.
Click to expand...
If I continue this statement, it includes a question ... "and did you perceive color differences between the SF?"
No I didn't, I saw two early black versions with very close serial numbers (mine and another one) that were both "green".

But someone has already seen color differences in individual SFs here, but you cleverly avoided an answer with your number games.

I think Holger is optics specialist enough to be able to see color differences in binoculars, so I trust his statement.

Andreas
 
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mulligatawny owl said:
I'm not convinced by Zeiss's quality control, my SF's have a lot of internal dust visible.
Click to expand...
That would make me seriously p***** off with what is over here a ~$3500 bin ...... actually that was last week with all the financial market crashing it's probably up over 4K now - the price - not the resolution ! :eek!:




Chosun :gh:
 
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