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Equipment Discussions >> Binoculars

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Glassthrower
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The effects of coatings on color fidelity.
      #1257501 - 11/18/06 10:46 AM

After another brief observing session last night, I was again struck by the COLOR rendition of these new GO SS binos.

I swear, that after years of Celestron Skymaster optics, I was accustomed to a bland, toned-down version of the night sky. I never understood all the hoop-la over carbon stars, red stars, and the like. With the obvious exception of Betelgeuse and Aldebaran, I rarely saw any reddish stars in the sky during my extensive observing.

Now, with these new GO SS binos, I am seeing LOTS of reddish stars. They are much more noticeable. The only explanation I can come up with is : improved coatings/optics.

Of course, the real test will be tonight. I am picking up my new glasses this afternoon, so I will have my first chance to try out the binos with clean, new, unscratched, non-high-index, glasses. I hope all of the red stars are still there, and not just a figment of my high-index polycarbonate scratched lenses.

Has anyone else noticed the outstanding color fidelity of these binos? I'm sure Fuji/Zeiss/Premium bino users are already accustomed to good color fidelity....but are there any other bino observers out there who are in a similar situation as mine (went from my budget glass to premium glass) and have also noticed the color?

Regards and clear skies...

MikeG

--------------------
Michael Gilmer - Member of the Meteoritical Society & Collector of Falling Stars.



Galactic Stone & Ironworks - Buy/Sell/Trade Meteorites, Moon Rocks, Mars Rocks, & 35 different falls and types!



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Joad
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Re: The effects of coatings on color fidelity. new [Re: Glassthrower]
      #1257770 - 11/18/06 01:22 PM

Hi GT. Since the purpose of the lens coatings is to reduce the reflection of light, and hence improve light throughput, I would hazard to say that, given the nature of night vision and its general suppression of the color sensitive cones in the eye, the more light you have coming through, the more likely those light starved color cones will receive enough light in the right wave lengths to be stimulated.

But I know that EdZ and Photonovore can give a better answer than this.


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Mark9473
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Re: The effects of coatings on color fidelity. new [Re: Joad]
      #1257798 - 11/18/06 01:46 PM

With my 7x50s from the same stable, I notice a lot more color intensity; I'm not sure about the color fidelity yet. Could be they're a slight bit warm.

--------------------
Mark
Leica 8x20; Vixen 8x42; Swift 8.5x44, 10x50 and 20x80; TS 7x50; Orion 15x63
WO Megrez II 80 FD + Baader 90° T2 Amici


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Mark9473
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Re: The effects of coatings on color fidelity. new [Re: Mark9473]
      #1257802 - 11/18/06 01:48 PM

Hey Joad I thought your answer was pretty good

--------------------
Mark
Leica 8x20; Vixen 8x42; Swift 8.5x44, 10x50 and 20x80; TS 7x50; Orion 15x63
WO Megrez II 80 FD + Baader 90° T2 Amici


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Glassthrower
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Re: The effects of coatings on color fidelity. new [Re: Mark9473]
      #1258493 - 11/18/06 10:21 PM

Joad, your explanation makes sense. And now that I have come inside for a break from observing with my new glasses, I can say that my new and heightened perception of color was not due to my old polycarbonate lenses. The new glass lenses see the same amount of increased color - with much less spiking/flaring. In fact, I would say that my new glasses have (roughly speaking) reduced my flaring problem by about one-third. A noticeable improvement. I am very pleased with the new spectacles and these Garrett binoculars.

Mark's comment about the view being a tad "warm" is right on the money. These do appear a bit warm, which is not a bad thing. If increased perception of color is a side effect of "warmth", then I am not complaining.

Now I await M42 to rise again. Last night was very good - transparent and stable. All four elements of the Trap were cleanly seperated in the 22x85 bino - albeit I had to position my head JUST RIGHT to avoid the plethora of scratches and the spiking caused by them. With the tiny image scale that the Trap presents at 22x, spurious spiking can interfere with the ability to split A,B,C,D.

I look forward to comparing the view tonight with the new glasses. The seeing looks about the same, but the sky is slightly less transparent.

Clear dark skies...

MikeG

--------------------
Michael Gilmer - Member of the Meteoritical Society & Collector of Falling Stars.



Galactic Stone & Ironworks - Buy/Sell/Trade Meteorites, Moon Rocks, Mars Rocks, & 35 different falls and types!



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dgs©
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Re: The effects of coatings on color fidelity. new [Re: Glassthrower]
      #1258516 - 11/18/06 10:41 PM

Glad to hear the new glasses are an improvement, but I wish they had been even better. I don't suppose the flaring could be from external light reflecting between the inside of the glasses and the surface of your eye, or even the ocular of the binoculars?
Maybe try a dark cloth over your head for a few minutes just to be sure there is no external light intruding?

--------------------
- david
8"Ø Newtonian on SVP, Moonlite CR2, Telrad
PST Oberwerk Ultra 15x70 Orion Ultraview 10×50
Hand-me-down Sears Refractor (Discoverer) 60mm×900mm



"What we have done for ourselves alone dies with us; what we have done for others and the world, remains and is immortal." --Albert Pike


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DJB
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Re: The effects of coatings on color fidelity. new [Re: dgs©]
      #1258738 - 11/19/06 03:29 AM

Hi Mike,

I am curious to know if your new glasses have an antireflection coating on THEM, in addition to the high index.

Good luck with your observing and enjoy your new glasses--both pair!

Best regards,
Dave.


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Glassthrower
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Re: The effects of coatings on color fidelity. new [Re: DJB]
      #1258963 - 11/19/06 10:45 AM

Hi Dave -

My glasses are non-high-index. Good ole fashioned "coke bottle" glass. And yes, they have the Zeiss AR coatings.

Last night I had a very good observing session. But, I was disappointed by the Leonid show. I saw only two Leonids from midnight local time until about 1:30am. I also saw two other non-Leonids. But, I was expecting much more.

Clear dark skies...

MikeG

--------------------
Michael Gilmer - Member of the Meteoritical Society & Collector of Falling Stars.



Galactic Stone & Ironworks - Buy/Sell/Trade Meteorites, Moon Rocks, Mars Rocks, & 35 different falls and types!



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Glassthrower
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Re: The effects of coatings on color fidelity. new [Re: Glassthrower]
      #1258968 - 11/19/06 10:46 AM

Quote:


Glad to hear the new glasses are an improvement, but I wish they had been even better. I don't suppose the flaring could be from external light reflecting between the inside of the glasses and the surface of your eye, or even the ocular of the binoculars?
Maybe try a dark cloth over your head for a few minutes just to be sure there is no external light intruding?





This is something I had not thought of. I do observe from a light polluted urban neighborhood, with lots of stray light, so this is possible. I have tried an "observing hood" a few times, but found them intolerable because of the HEAT down here. But, now that winter (or what passes for winter here) is here, I will give the hood another try.

Clear dark skies...

MikeG

--------------------
Michael Gilmer - Member of the Meteoritical Society & Collector of Falling Stars.



Galactic Stone & Ironworks - Buy/Sell/Trade Meteorites, Moon Rocks, Mars Rocks, & 35 different falls and types!



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KennyJ

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Re: The effects of coatings on color fidelity. new [Re: Glassthrower]
      #1259025 - 11/19/06 11:34 AM

Mike ,

I'm pleased the new glasses are at least providing SOME improvement , and I agree the " hood " could be the way to go to improve things even more .

I too was completely underwhelmed with the Leonid show , or rather lack of it .

I managed just 25 minutes after midnight , in 36 degree F temperatures with a bitterly cold wind before giving it up as a bad job , with not a single sighting .

The stars were very nice to look at though !

Regards , Kenny

--------------------
Two eyes and a preference to use both



Zeiss 7 x 42 BGAT
Captain's Helmsman 7 x 50
Nikon 10 x 42 Superior E
Swift Audubon Kestrel 10 x 50
Helios 15 x 70 Observation
Strathspey 20 x 90
Televue 76 APO
Zeiss 85 Diascope
Helios 102 f5 refractor
Various eyepieces barlows tripods mounts etc.
Panasonic Lumix DMC - TZ5 digital camera


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Mark9473
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Re: The effects of coatings on color fidelity. new [Re: KennyJ]
      #1259068 - 11/19/06 12:00 PM

Kenny, you were too early... But don't feel bad, I was completely clouded out.

--------------------
Mark
Leica 8x20; Vixen 8x42; Swift 8.5x44, 10x50 and 20x80; TS 7x50; Orion 15x63
WO Megrez II 80 FD + Baader 90° T2 Amici


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KennyJ

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Re: The effects of coatings on color fidelity. new [Re: Mark9473]
      #1259081 - 11/19/06 12:12 PM

Thanks Mark ,

Yes , I see from this web page that 4.49am GMT was the predicted PEAK activity time for my location !

http://www.arm.ac.uk/leonid/2006/info2006.html#max

Regards , Kenny

--------------------
Two eyes and a preference to use both



Zeiss 7 x 42 BGAT
Captain's Helmsman 7 x 50
Nikon 10 x 42 Superior E
Swift Audubon Kestrel 10 x 50
Helios 15 x 70 Observation
Strathspey 20 x 90
Televue 76 APO
Zeiss 85 Diascope
Helios 102 f5 refractor
Various eyepieces barlows tripods mounts etc.
Panasonic Lumix DMC - TZ5 digital camera


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