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Old 07-15-2017, 05:27 PM   #1
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A kid safe eclipse viewer made for free out of a box.

How to make a no-cost pinhole eclipse viewer safe for kids.

The best results are had if the "pinhole" is made from very thin, opaque material, tin foil or black construction paper, and the edges of the hole are very smooth. (This just helps the quality of the "optics") Cut a 1 inch square hole in your box and tape your pinhole material over that. An ordinary paper hole puncher will make a decent "pinhole"

The pinhole needs to be sort of "high up" to get over your head. A white piece of paper helps brighten the image. The bottom of the box doesn't really need to be enclosed. In fact if there is enough space it might be good of an adult can see in there to help "aim" the thing.

You'll swear it isn't working, but when the moon begins to obscure the sun, you'll the that white dot isn't round anymore, but has a "bite" taken out of it.

Trust me this thing will work, and is great for kids who are old enough to understand what's happening with the eclipse.

*****

Seems I recall there was an eclipse back when I was about second grade. It wasn't anywhere near totality where we were (Georgia). I remember we made several of these but for some reason never used them. Maybe it was rainy the day of the eclipse.
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Old 07-15-2017, 07:42 PM   #2
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I also remember making something very similar to this as a kid. I worked very well in California. We are hoping to be somewhere close to this eclipse and are taking several welding helmets for this great two minute adventure!
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Old 07-15-2017, 07:54 PM   #3
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Originally Posted by Camper Al View Post
I also remember making something very similar to this as a kid. I worked very well in California. We are hoping to be somewhere close to this eclipse and are taking several welding helmets for this great two minute adventure!
Welding helmets may or may not be safe - depending on the filter installed.

Must be green shade 14 or higher. Do some research, make sure you've got a safe filter in there.

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Old 07-15-2017, 08:35 PM   #4
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Quote:
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Welding helmets may or may not be safe - depending on the filter installed.

Must be green shade 14 or higher. Do some research, make sure you've got a safe filter in there.

On a photography podcast I listened to about it they had a "expert" if you will and said that you can not really trust the welding glass like you said because a solar filter may or does also contain other coatings to keep other radiation off the eyes that a welding mask would not have.
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Old 07-16-2017, 01:06 PM   #5
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viewing the sun

A special photographic filter can be used on telescopes and cameras.
However never use anything like these filters, or welding filters of any sort for directly viewing the sun.
Amazingly, science shops, (mail order) and local science centers (educational) and even Amazon sell cheap cardboard glasses for about a dollar that are completely and totally safe for children and adults to view the sun directly.
USE THESE ONLY.
Welding helmets, and goggles do not protect the eyes adequately. Smoked glass is a joke.
Do not view the sun during totality without protection, the total eclipse is inadequate reduction of actinic light, and will damage vision.
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Old 07-16-2017, 01:13 PM   #6
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Got a 8x8" piece of solar filter film for my telescope. Just have to fashion a holder to go over the barrel. 1/1000th of 1% of light emittance. 8 bucks on amazon.
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Old 07-16-2017, 01:17 PM   #7
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Quote:
Originally Posted by hankpac View Post
A special photographic filter can be used on telescopes and cameras.
However never use anything like these filters, or welding filters of any sort for directly viewing the sun.
Amazingly, science shops, (mail order) and local science centers (educational) and even Amazon sell cheap cardboard glasses for about a dollar that are completely and totally safe for children and adults to view the sun directly.
USE THESE ONLY.
Welding helmets, and goggles do not protect the eyes adequately. Smoked glass is a joke.
Do not view the sun during totality without protection, the total eclipse is inadequate reduction of actinic light, and will damage vision.
If you are in an area of totality...you can safely view the "Total" eclipse without eye protection...BUT NOT UNTIL TOTALITY...AND ONLY DURING !!!

The only time that the Sun can be viewed safely with the naked eye is during a total eclipse, when the Moon completely covers the disk of the Sun. It is never safe to look at a partial or annular eclipse, or the partial phases of a total solar eclipse, without the proper equipment and techniques. NASA 2012
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Old 07-16-2017, 04:39 PM   #8
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Wife has special lens and is connecting her camera via HDMI to the TV monitor on the outside of our motor coach for us to view as it occurs.
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Old 07-17-2017, 10:31 AM   #9
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The box idea is a very safe way to view the eclipse but another variation of it is to use a 3-4' mailing tube. One end gets covered with a piece of aluminum foil with a pinhole in it. At the other end, cut away half the tube for around two inches and tape a white index card over the end of the tube. To use, rest the tube on your shoulder with the pinhole facing the sun. When the shadow of the tube becomes a circle, it's pointed properly and you should see the sun's image on the index card.

The best way to make the pinhole is to place the foil on a piece of wood and use a sewing needle. This helps avoid the foil tearing and not making a round hole. The smaller the hole the dimmer the image and the sharper it'll be. The longer the tube is, the larger and dimmer the image will be.

Phil
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