<p>Projection is a safe way to view the partial phase of the eclipse. </p>

<p>A pinhole produces a small image of the sun, but doesn't require any special equipment. A larger image can be obtained by projecting through a telescope:</p>

<p>Point the scope at the sun, but never look down a scope that is pointing anywhere near the sun, neither look along the tube. Use its shadow to line it up with the sun.  Hold a white card half a metre or so behind the eyepiece, and focus the telescope to make a sharp image of the sun. You will want to provide some shade for the image. </p>

<p><a href="https://i.sstatic.net/iQIp6.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/iQIp6.png" alt="enter image description here"></a></p>

<p>Image from <a href="https://www.bakersfieldcollege.edu/planetarium/observing-the-sun-safely" rel="nofollow noreferrer">Bakersfield College </a></p>

<p>This works well with binoculars, you need some way to mount, or prop up the binoculars, and you will need to cover up one of the lenses (or you will get two overlapping images.</p>

<p>If you have a larger telescope, you will want to cut down the aperture, to prevent overheating.</p>

<p>You will be able to see sunspots on the disc of the sun and the growing bite of the sun hidden behind the moon (which will be otherwise unseen). You can practice on any sunny day, You should be able to see some sunspots, and perhaps faculae on any day.</p>

<p>Other alternatives are specially designed solar viewing glasses. They must be unscratched and meet ISO 12312-2:2015 standard. Welders glass is also possible if rated "14" (the darkest possible).</p>

<p>It is not possible to use any form of glasses with a telescope. It is possible to get an aperture filter, which may be useful if you have the right telescope, but the projection method is better if you want more than one person to view at the same time.</p>

<p>Any kind of improvised solar filter is unsafe. This includes: stacks of sunglasses, pop-tarts wrappers, exposed film and viewing reflections in water.</p>

<p>During totality, the sun is hidden by the moon, and so it is not dangerous to look at the solar corona during totality with the naked eye. If you had been wearing solar viewing glasses, be ready to replace them. You MUST put them back on before totality ends.</p>

<p>Photography is hard. The images of the solar eclipse are made with professional telephoto lenses and good deal of skill. Instead you can photograph the scene. A timelapse of the eclipse can be a very effective way to record the event, especially if you have some interesting foreground and background. The eclipse itself will be a tiny dot you can still document how the scenery and shadows change during the event.</p>

CC BY-SA 3.0
2017-05-25T19:38:41.243Z
I really like this, as I have a low end, starter telescope available.   Is this a setup that I can test on the sun directly and fine-tune weeks before the eclipse?
abelenky
CC BY-SA 3.0
2017-05-25T19:39:19.837Z
Absolutly. You should get to see some sunspots too.
James K
CC BY-SA 4.0
2024-01-03T21:18:34.583Z
Do you happen to know of any good ways to attach the white card, so you don't have to hold it still to keep it in focus?
Cascabel
CC BY-SA 4.0
2024-01-03T23:27:14.183Z
It's never been much of an issue. When I've done this with children (not during an eclipse,but to look at sunspots) I've propped the card against a stack of books.  One time I used a mirror to reproject onto the ceiling.
James K
CC BY-SA 3.0
2017-05-25T19:34:38.930Z
2017-08-02T19:39:09.877Z
2017-08-02T19:39:09.877Z
James K
<p>I don't think you can get much better safety instructions for viewing than from <a href="https://eclipse.gsfc.nasa.gov/SEhelp/safety.html" rel="nofollow noreferrer">NASA</a>. Welder's classes are a pretty good choice. As for photography, I think <a href="http://www.nikonusa.com/en/learn-and-explore/a/tips-and-techniques/how-to-photograph-a-solar-eclipse.html" rel="nofollow noreferrer">Nikon</a> would be a knowledgeable source, and they recommend a solar filter.</p>

CC BY-SA 3.0
2017-05-25T18:27:54.630Z
This doesn't answer the question, as it depends on the links. We welcome complete answers that can stand alone, even if the links fail
James K
CC BY-SA 3.0
2017-05-25T20:57:17.017Z
Ah, ok. Will do that next time.
Phil N DeBlanc
CC BY-SA 3.0
2017-05-25T17:42:02.037Z
2017-05-25T17:42:02.037Z
Phil N DeBlanc
<p>Astro solar filter is good.  Baader Planetarium make this:</p>

<p><a href="http://www.baader-planetarium.com/en/solar-viewer-astrosolar-silver-gold-(1pc-10pc-25pc-100pc).html" rel="nofollow noreferrer">http://www.baader-planetarium.com/en/solar-viewer-astrosolar-silver-gold-(1pc-10pc-25pc-100pc).html</a></p>

<p>I have used this filter in front of a 4 inch refractor with no adverse effects.</p>

<p>I don't know where you are based but this product should be easily obtainable in the UK, USA and Germany.  I have no affiliation with the company.</p>

CC BY-SA 3.0
2017-05-25T20:04:42.400Z
2017-05-25T20:04:42.400Z
Dr Chuck
<p>August 21 is going to see a total eclipse across most of the US, and I'm planning a trip to what I hope is an <a href="http://www.stjomo.com/eclipse2017/" rel="nofollow noreferrer">ideal viewing location</a>.</p>

<p>What are good ways to safely view the eclipse?  </p>

<p>I don't want to make a big trip out of it, only to be looking into a poor quality pin-hole shoebox, or $2 mirrored cardboard glasses.  How can get I get a good, detailed clear view of it while staying safe?  What about ways to photograph it effectively?</p>

CC BY-SA 3.0
2017-05-25T19:28:01.307Z
I suggest you split the photography question off. Good astrophotography is different from safe observation.
James K
<solar-eclipse><photography>
Good ways to safely view an Eclipse?
abelenky
# Good ways to safely view an Eclipse?

(Asked by: username_0 on 2017-05-25)

August 21 is going to see a total eclipse across most of the US, and I'm planning a trip to what I hope is an [ideal viewing location](http://www.stjomo.com/eclipse2017/).

What are good ways to safely view the eclipse?

I don't want to make a big trip out of it, only to be looking into a poor quality pin-hole shoebox, or $2 mirrored cardboard glasses. How can get I get a good, detailed clear view of it while staying safe? What about ways to photograph it effectively?

**Tags:** solar-eclipse, photography
> **Comments:**
> **username_1**: I suggest you split the photography question off. Good astrophotography is different from safe observation.  

---

## 3 answers

### Answer by username_1 on 2017-05-25. Score: 5

Projection is a safe way to view the partial phase of the eclipse.

A pinhole produces a small image of the sun, but doesn't require any special equipment. A larger image can be obtained by projecting through a telescope:

Point the scope at the sun, but never look down a scope that is pointing anywhere near the sun, neither look along the tube. Use its shadow to line it up with the sun. Hold a white card half a metre or so behind the eyepiece, and focus the telescope to make a sharp image of the sun. You will want to provide some shade for the image.

[![enter image description here](https://i.sstatic.net/iQIp6.png)](https://i.sstatic.net/iQIp6.png)

Image from [Bakersfield College](https://www.bakersfieldcollege.edu/planetarium/observing-the-sun-safely)

This works well with binoculars, you need some way to mount, or prop up the binoculars, and you will need to cover up one of the lenses (or you will get two overlapping images.

If you have a larger telescope, you will want to cut down the aperture, to prevent overheating.

You will be able to see sunspots on the disc of the sun and the growing bite of the sun hidden behind the moon (which will be otherwise unseen). You can practice on any sunny day, You should be able to see some sunspots, and perhaps faculae on any day.

Other alternatives are specially designed solar viewing glasses. They must be unscratched and meet ISO 12312-2:2015 standard. Welders glass is also possible if rated "14" (the darkest possible).

It is not possible to use any form of glasses with a telescope. It is possible to get an aperture filter, which may be useful if you have the right telescope, but the projection method is better if you want more than one person to view at the same time.

Any kind of improvised solar filter is unsafe. This includes: stacks of sunglasses, pop-tarts wrappers, exposed film and viewing reflections in water.

During totality, the sun is hidden by the moon, and so it is not dangerous to look at the solar corona during totality with the naked eye. If you had been wearing solar viewing glasses, be ready to replace them. You MUST put them back on before totality ends.

Photography is hard. The images of the solar eclipse are made with professional telephoto lenses and good deal of skill. Instead you can photograph the scene. A timelapse of the eclipse can be a very effective way to record the event, especially if you have some interesting foreground and background. The eclipse itself will be a tiny dot you can still document how the scenery and shadows change during the event.

> **Comments:**
> **username_0**: I really like this, as I have a low end, starter telescope available.   Is this a setup that I can test on the sun directly and fine-tune weeks before the eclipse?  
> **username_1**: Absolutly. You should get to see some sunspots too.  
> **username_2**: Do you happen to know of any good ways to attach the white card, so you don't have to hold it still to keep it in focus?  
> **username_1**: It's never been much of an issue. When I've done this with children (not during an eclipse,but to look at sunspots) I've propped the card against a stack of books.  One time I used a mirror to reproject onto the ceiling.  

---

### Answer by username_3 on 2017-05-25. Score: 3

I don't think you can get much better safety instructions for viewing than from [NASA](https://eclipse.gsfc.nasa.gov/SEhelp/safety.html). Welder's classes are a pretty good choice. As for photography, I think [Nikon](http://www.nikonusa.com/en/learn-and-explore/a/tips-and-techniques/how-to-photograph-a-solar-eclipse.html) would be a knowledgeable source, and they recommend a solar filter.

> **Comments:**
> **username_1**: This doesn't answer the question, as it depends on the links. We welcome complete answers that can stand alone, even if the links fail  
> **username_3**: Ah, ok. Will do that next time.  

---

### Answer by username_4 on 2017-05-25. Score: 0

Astro solar filter is good. Baader Planetarium make this:

<http://www.baader-planetarium.com/en/solar-viewer-astrosolar-silver-gold-(1pc-10pc-25pc-100pc).html>

I have used this filter in front of a 4 inch refractor with no adverse effects.

I don't know where you are based but this product should be easily obtainable in the UK, USA and Germany. I have no affiliation with the company.


---

