How to photograph the October 14 annular solar eclipse

How to photograph the October 14 annular solar eclipse

Find our how to photograph this week's annular solar eclipse.

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Published: October 9, 2023 at 8:56 am

In this guide we'll reveal how you can photograph the October 14 annular solar eclipse.

The Moon moves across the face of the Sun on October 14 2023, leading to a wonderful solar eclipse as seen from Earth.

The October annular solar eclipse will be running a decent path down through the US.

This won't be a total solar eclipse, but will instead be an annular solar eclipse or 'ring of fire' eclipse.

Read our complete guide to viewing the October 14 solar eclipse and find out when the next eclipse is occurring.

Image showing an annular ring of fire eclipse. Credit: Jingying Zhao / Getty Images
Image showing an annular ring of fire eclipse. Credit: Jingying Zhao / Getty Images

Away from the path of annularity, an ever-decreasing magnitude of partial solar eclipse will be seen.

When far enough away from the path, the Moon will appear to miss the Sun completely, giving no eclipse experience whatsoever.

You can see the effect of this in our October eclipse map below. Use the map to work out what you'll see from your location and when.

Or work out how far away you are from the regions that will experience the full eclipse (the path of annularity).

A map of the October 14 annular solar eclipse path. Credit: BBC Sky at Night Magazine.
A map of the October 14 annular solar eclipse path. Credit: BBC Sky at Night Magazine.

October 14 eclipse timings

The October 14 eclipse will begin in the US in Oregon at 9:13 am PDT. It will move southeast, leaving Texas at 12:03 pm CDT.

The narrow ‘path of annularity’ (where the full ring of fire will be seen) begins south of Alaska.

The eclipse will be visible across the US, Mexico, Belize, Guatemala, Honduras, Nicaragua, Costa Rica, Panama, Colombia and Brazil.

The path of annularity will reach about 140 miles at its widest, with the maximum duration of the ‘ring of fire’ occurring off the coast of Nicaragua in the Gulf of Mexico.

Ways of photographing the October 14 eclipse

It goes without saying that certified solar filters must be fitted to cameras and telescopes that are pointed at the Sun.

And you should never observe the Sun with the naked eye: only with certified solar eclipse glasses or with a dedicated solar telescope, or a telescope expertly-fitted with a certified solar filter

Solar projection

A solar projection screen is a great way of viewing the Sun safely, and can also be used for eclipses.

You can use the technique of solar projection to photograph the progression of the eclipse.

Here, a telescope fitted with an eyepiece is pointed at the Sun, but without looking through it.

A screen is held up to catch the bright light emitted from the eyepiece and with a bit of careful focusing, a detailed Sun image can be projected onto the screen.

This image can be safely watched or captured, but there are provisos.

The projection of a partial solar eclipse in New Delhi, India, 29 March 2006. Credit: L Manan Vatsyayana/AFP via Getty Images

Projection has associated dangers. It’s a technique only suitable for refractors below 5-inches (127mm) in diameter.

People use reflectors to project the Sun’s image, but there is a potential for damage to be caused to instruments.

Enclosed optical tubes such as those found in SCTs are unsuitable for projection due to internal heating.

If you do go down the projection route, never leave the setup unattended and keep everyone’s eyes away from the eyepiece!

Always cap or remove the finderscope and, when you've finished safely observing, put the cap on the telescope and point it away from the Sun.

Solar filters on a telescope

Sequence of Eclipse by Paul Mason, Cannock, UK. Equipment: Canon 1100D, white light filter.
Sequence of Eclipse by Paul Mason, Cannock, UK. Equipment: Canon 1100D, white light filter.

A full or offset aperture white light filter allows you to view and photograph a dimmed version of the Sun safely during an eclipse.

Such telescope filters are normally bought as a sheet or roll and, after a bit of DIY, cover the front aperture of your telescope.

Once you’ve capped or removed all finders, you’re good to go.

However, this technique must only be carried out by an experienced astronomer. If in doubt do not risk it.

Only ever buy safe certified filters from a reputable supplier, and always check your filter for pinpricks or tears before use.

Calcium-K view of the Sun. Credit: Pete Lawrence

You can also use hydrogen-alpha (Ha) or calcium-K (CaK) solar filters. These are ideal for grabbing a less conventional image.

Using an Ha filter, you can check for solar prominences and it will allow you to view a ‘fur-like’ edge to the Sun’s chromosphere known as the spicule layer.

Furthermore, a magnified view of the section of limb where the Moon first makes contact or leaves the Sun’s disc will allow you to catch the edge of the Moon as it crosses this strip.

Eclipse and prominences James Robertson, London Equipment: ZWO ASI178 mono camera, Lunt LS60THa H-Alpha solar telescope, Sky-Watcher SolarQuest mount
Eclipse and prominences captured by James Robertson from London , UK. Equipment: ZWO ASI178 mono camera, Lunt LS60THa H-Alpha solar telescope, Sky-Watcher SolarQuest mount

Photograph the October 14 solar eclipse: step-by-step

Step 1

How to photograph the 10 June 2021 solar eclipse. Credit: Pete Lawrence Decide on the setup you want to use to image the eclipse:

  • White light solar film
  • Projection
  • Herschel wedge (a prism arrangement that allows heat to be directed away from the eyepiece)
  • Speciality solar filters such as hydrogen-alpha (Ha) and calcium-K (CaK)
Research how to use these methods properly before the eclipse.

Step 2

How to photograph the 10 June 2021 solar eclipse. Credit: Pete Lawrence Select a camera. A DSLR works fine for white light, but it’s less effective with Ha or CaK wavelengths. DSLR still images will be affected by prevailing seeing, the effects worsening with increased image scale. A mono high frame rate camera gives crisp results, but captures need to be short to avoid blurring from lunar motion.

Step 3

How to photograph the 10 June 2021 solar eclipse. Credit: Pete Lawrence Get to know the view orientation to catch the beginning of the eclipse (first contact) at high image scale. Equatorial telescope mounts are easiest for this, but it also can be worked out for altaz mounted equipment. The free software Tilting Sun shows how different mounts will affect the view of the Sun. The image above shows our calculations for the 10 June 2021 solar eclipse.

Step 4

Difference between an altaz and an equatorial mount For equatorial mounts, moving a telescope south in declination means the last edge of the Sun visible is the southern limb. Slewing east in RA, the last edge visible is the eastern limb. The position-angle measures the number of degrees from north (0°) travelling east (90°), south being 180°, west 270°.

Step 5

How to photograph the 10 June 2021 solar eclipse. Credit: Pete Lawrence If using an equatorial mount, set it up on nights before the eclipse to ensure accurate polar alignment. Practise photographing the Sun in the run-up to October 14. Using control software, ensure your high frame rate camera’s exposure level isn’t saturated, but 80-90% peak. Aim for a rate of over 60 frames per second.

Step 6

How to photograph the 10 June 2021 solar eclipse. Credit: Pete Lawrence Set up early on October 14 to give yourself as much time as possible. If using hydrogen-alpha equipment, remember first contact will occur a bit earlier than for white light due to prominences/spicules along the Moon’s path. Keep capture sequences short, say 10-30”. For the time of first contact see timeanddate.com.

If you do manage to photograph the October 14 annular solar eclipse, we’d love to see your image! It could even end up in the next issue of BBC Sky at Night Magazine. Find out how to send us your images.

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