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Sunglasses Effect on Perceived Scope Picture

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/11/2009 at 20:14
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I have older scopes that are made by the best companies in the market today they are mostly now Zeiss / Hensoldt or Swarovski / Kahles or made by Leupold and or Redfield.  I have noticed that they all seem somewhat dim compared to the newer glass of the day and they do lack some ability to distinguish color at distances.  I know that there is a visible spectrum that we humans can only distinguish between certain wavelengths compared to say Dogs or Birds or Insects.  I know that the brain can not interpret data as fast as our eyes can see things and that some colors tend to blend together and that some people have certain abilities to distinguish colors that others would view as saturated or mixed colors and or undistinguishable colors  I know that achromatism can happen when looking through certain lenses and that you can get different effects at different distances or focuses. 

I think this is where I am confused. 

I have seen that some of the older scopes can do a better job even though they are dimmer or visibly not as bright at not having these purple/blue/black colors at the edges and that some of the newer lenses that clam to be LD, SLD, ED, UL, or HD glass can minimize these effects.

I have been able to change my shooting glasses lenses.

I was issued a certain few types for differing conditions by a brand I cannot remember for the life of me.
 
(I now use SMITH and have yellow, ruby, amber, grey, green and clear…)
 
I have noticed huge differences with the colors and was wondering if anyone could help me to understand why. 
 
It seems that the amber lenses and the green lenses can help any older scope to almost seem clearer/sharper and am able to distinguish tones better than when not using these glasses and lenses.

I was told that some of the lenses have thorium dioxide and this has high refraction and low dispersion but that is what causes the yellow tint or darkness of the lenses or scopes.  I am wondering if any certain color of glasses can take away or filter this effect.

I am seemingly unable to comprehend why I am seeing certain effects with different colors.  I remember one thing they told us and that is this an eagle has a certain coating over its eye that allows for filtering of wavelengths and keeps the movement more visible without blurring and that its brain is better than ours at responding to these sensitivities.

 I am wondering if there is a way to get better transmission or filtering of natural lighted things to my brain to allow me to see better. 
 
So far sunglasses have done ok but I am still trying to see if any other media works for this.
 
Why are different colors having different effects on what I see through the scope ocular lense?
 
Is this just my imagination?
 
Has anyone else noticed differences with different color lenses or certain coatings.
 
Do they make lense color kits for scopes that correct this fringing?
 
I have seen Yellow on some Russian Scopes and a few German Scopes but not any newer scopes.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/11/2009 at 21:58
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I have witnessed the same thing so your not crazy. I think Koshkin would be able to give us a good explanation of the effect. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/11/2009 at 22:26
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Koshkin is probably the best person to answer this however having been a professional photographer I have used numerous filters and devices to alter the image and either bring out certain features or hide certain features.  http://www.cokin.fr/   Cokin makes creative filters however there are other companies who also make some including Nikon and it was always common practice to place a UV/Haze filter which appeared clear over the front lens to protect it - an idea which would probably be advantageous in protecting expensive rifle scope lenses as well.  I have done this with a couple of my Leupolds with the amber color filter. There are also adapters from one filter size to another which might allow camera filters to be used on a rifle scope.  

One other point of trivia is that out of focus highlights take on the shape of the maximum aperture of a lens.   So if you cut a black piece of paper - heart shape put it in front of the lens open the aperture all the way up and take a close up of someone with christmas lights behind them each out of focus light will be heart shaped, makes candles behind the bride and groom heart shaped flames etc.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/12/2009 at 06:47
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I too have noticed the color variations looking thru different scopes and binoculars. 
 
This summer I was out fishing and had a pair of polarized sunglasses on.  Caught a nice bass and wanted to take a quick pic of it to send to my brother and thus inflict torture since it was in the middle of the work day.  I yanked out the cell phone and proceded to take the pic except I couldn't see anything on the screen.  I tried several times but it was blank.
 
Thinking my cellp was dead or just having issues I gave up, threw the fish back and went about my day.... 2 hours later I went to use my cell phone on the way home and it was working normally which is when I got the 'duh huh'... Put my fishing glasses back on and walla, the screen went away, took them off 'magic' the screen reappeared........ 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/12/2009 at 14:54
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Interesting topic Get Your Popcorn Ready
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/14/2009 at 12:51
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Very Good response PM'd from Koskin?...

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/19/2009 at 02:54
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Originally posted by 338LAPUASLAP 338LAPUASLAP wrote:

Very Good response PM'd from Koskin?...


Feel free to copy it here if you'd like.

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/19/2009 at 21:04
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could you i must have removed it...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/19/2009 at 21:09
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If you have erased, then I do not have a copy in the outbox either. 
Now I have to try to remember what I said.

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/19/2009 at 21:19
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Some of my general comments are interspersed through the text in blue italics.  If you have follow up questions, I'll answer them the best I can.


Originally posted by 338LAPUASLAP 338LAPUASLAP wrote:

I have older scopes that are made by the best companies in the market today they are mostly now Zeiss / Hensoldt or Swarovski / Kahles or made by Leupold and or Redfield.  I have noticed that they all seem somewhat dim compared to the newer glass of the day and they do lack some ability to distinguish color at distances.  I know that there is a visible spectrum that we humans can only distinguish between certain wavelengths compared to say Dogs or Birds or Insects.  I know that the brain can not interpret data as fast as our eyes can see things and that some colors tend to blend together and that some people have certain abilities to distinguish colors that others would view as saturated or mixed colors and or undistinguishable colors  I know that achromatism can happen when looking through certain lenses and that you can get different effects at different distances or focuses. 

I think this is where I am confused. 

I have seen that some of the older scopes can do a better job even though they are dimmer or visibly not as bright at not having these purple/blue/black colors at the edges and that some of the newer lenses that clam to be LD, SLD, ED, UL, or HD glass can minimize these effects.

Type of glass used is not everything.  For a well corrected design that is not overly ambitious (not trying to make a super short scope with 50mm objective, for example), you do not need exotic materials.  An older scope with good design and attention to detail can perform spectacularly well.  The coatings may not be as good as current best, but overall system design is likely very sound.

I have been able to change my shooting glasses lenses.

I was issued a certain few types for differing conditions by a brand I cannot remember for the life of me.
 
(I now use SMITH and have yellow, ruby, amber, grey, green and clear…)
 
I have noticed huge differences with the colors and was wondering if anyone could help me to understand why. 
 
It seems that the amber lenses and the green lenses can help any older scope to almost seem clearer/sharper and am able to distinguish tones better than when not using these glasses and lenses.

Colored lenses/filters attenuate certain colors/wavelengths.  That makes the other colors stand out more.  Your brain processes things differentially, so it can help in certain situations.  This also depends on what your eyes like and the type of ambient lighting available.

I was told that some of the lenses have thorium dioxide and this has high refraction and low dispersion but that is what causes the yellow tint or darkness of the lenses or scopes.  I am wondering if any certain color of glasses can take away or filter this effect.

Thorium dioxide was used in the past.  It starts out fairly transparent, but turns yellow and then brown with age since it is radioactively decaying.  It has been largely replaced by other glass dopants.

I am seemingly unable to comprehend why I am seeing certain effects with different colors.  I remember one thing they told us and that is this an eagle has a certain coating over its eye that allows for filtering of wavelengths and keeps the movement more visible without blurring and that its brain is better than ours at responding to these sensitivities.

 I am wondering if there is a way to get better transmission or filtering of natural lighted things to my brain to allow me to see better. 

Eagles do see better than we do.  Just a fact of life.
 
So far sunglasses have done ok but I am still trying to see if any other media works for this.
 
Why are different colors having different effects on what I see through the scope ocular lense?
 
Is this just my imagination?
 
Has anyone else noticed differences with different color lenses or certain coatings.
 
Do they make lense color kits for scopes that correct this fringing?
 
I have seen Yellow on some Russian Scopes and a few German Scopes but not any newer scopes.

Amber/yellow filtering can help you perceive resolution a little better.  However, color balance and contrast change. Personally, I prefer natural looking colors, so I am not big fan on color filters.

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