[LVAS] Astro-Goggles

[Fred Rayworth]

Rob,

 

My take is that any light brighter than the object you are looking at is going to affect your vision for a little while. A red light does less damage than say a white one, but it is still far more intense than a faint fuzzy. I just live with it as I go from one object to the next and have to consult my star charts between each one. Though my red flashlight has weak batteries in it at the moment, I know I'm losing just a bit of dark adaptivity between each object. Then again, with a 16" aperture, it isn't as big a problem for me as others with smaller scopes.

 

Fred


 
> Date: Wed, 9 Sep 2009 07:54:08 -0700
> From: scopegeek at gmail.com
> To: lvas at lvlug.org
> Subject: Re: [LVAS] Astro-Goggles
> 
> Roger,
> 
> I'm not sure of your meaning in this statement: "Using a red light can
> reduce your dark adaptability significantly for the longest time."
> 
> Are you saying that using a red light hurts your night vision or that it
> reduces the time required for you to become dark adapted? English is such a
> precise language, you know.
> 
> Hopefully, folks realize that these are simple red-lens goggles and not
> night-vision goggles in the sense of increased light sensitivity. But, you
> can't assume anything, now-a-days, can you?
> 
> BTW - I, too, will try to observe the Small Scope Challenge Objects again
> this month. I just hope Cathedral Gorge is dark and cloud free. I hope you
> can make it out to one of our Cathedral Gorge or Death Valley outings in the
> future. I would enjoy observing side by side with you sometime.
> 
> Take care.
> 
> Rob
> 
> 
> 
> On Wed, Sep 9, 2009 at 6:23 AM, roger ivester <drivester at hotmail.com> wrote:
> 
> >
> > All,
> >
> >
> >
> > I purchased this pair of astro-goggles many year ago. They seem to be
> > unavailable at current. Most amateurs today have never even heard of them.
> >
> >
> >
> > If you are unfamiliar with the goggles, they can protect your night vision
> > if you have to use a flashlight or go back into your house. If an object is
> > extremely dim I can both sketch and take notes intermittently while
> > observing. I observe through the eyepiece and then remove them for the
> > intermittent sketching and notes.
> >
> >
> >
> > Using a red light can reduce your dark adaptability significantly for the
> > longest time. I also put them on while selecting a different eyepiece. Be
> > advised, you cannot walk in the dark and you "definitely" could not drive
> > with them on.
> >
> >
> >
> > If you remove your eye from the eyepiece and do other things with a red
> > light you will not be able to see that 13m star or 15th magnitude galaxy. I
> > put them on in the house at least 15 minutes before I go out. Your time to
> > dark adapt will be greatly reduced.
> >
> >
> >
> > Does anyone own or is familiar with these goggles?
> >
> >
> >
> > This is an important part of "optimized" observing to see the faintest
> > details possible.
> >
> >
> >
> > Roger Ivester
> >
> >
> >
> >
> >
> >
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> >
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> >
> > The moon and stars to govern the night..... Psalm 136:9
> >
> >
> >
> >
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> >
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> >
> 
> 
> -- 
> Rob Lambert
> 702-461-1390
> _______________________________________________
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