[LVAS] Astro-Goggles

[Rob Lambert]

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,
>
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>
> 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.
>
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> 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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>    The moon and stars to govern the night.....   Psalm 136:9
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-- 
Rob Lambert
702-461-1390