The sun, the giver of life on this planet and so important to photography. It provides the natural light photographers crave after but it’s a subject in itself that few other than astrophotographers ever attempt. Loads of people will have a crack at photographing the moon but few will take on the dangers of the sun but it’s not as hard as you might think even with some standard photographic equipment.
Of course, using a telescope with a solar film filter or a dedicated solar scope will provide the best results but you can still capture those sunspots with possibly, what you have already.
Before we proceed though, a warning. Photographing the sun is dangerous, I cannot stress this enough. Blindness can occur in seconds and photographic equipment can be ruined just as quickly but proceeding with some caution you can minimise risks and catch pictures of the surface of the closest star to Earth. I accept no responsibility for any lack of sight or melted cameras that may result from the following, you try this at your own risk.
OK? Not freaked you out? Let’s get started!
Firstly you will need:
DSLR camera (preferably)
As big a lens as you have (I use a Sigma 70-200mm f2.8 and 2x tele giving 400mm)
At least one 10 stop photographic filter or enough filtration to get as much as 10 stops.
The 10 stop filter is essential. If you don’t have one, can’t get access to one or can’t replicate with other filters DO NOT proceed. Some filter sets come with 3 standard ND filters, 0.9, 0.6 and 0.3 which stacked will give you 6 stops, which is NOT ENOUGH but if you can add others in there to get to 10 stops on you go.
For extra safety I like to shoot with the DSLR tethered to my MacBook pro using the Nikon only Sofortbild software to control the camera but you can get away with a standard remote control on the camera, it’s just not quite as easy.
To get started, mount your camera on the tripod and add the 10 stop filter to the lens, set your focus to infinity and using the live view feature on your camera or laptop preview, locate the sun. Once you have it, cover the lens to stop heat build up. Now, switch on Exposure delay mode if your camera has it, close the lens up as much as you can, f22 or higher, I use f32 on my own setup. You should be in manual exposure mode, so set your exposure to as high as it will go, typically around 1/4000th and your ISO as low as it will go, typically ISO100.
Now, you’re good to go, uncover the lens, take the shot and cover the lens again. Now you can check what you have. You should have a white-ish disc, sunlight is white not yellow and if sunspots are visible then there will be darker areas on the disc. From here you can adjust exposure to get the best possible shot but DO NOT exposure for any length of time, keep the exposures in the region of thousandths on seconds, you do not need to go any higher at all.
If no sunspots are visible it may be that the side of the sun facing us has no activity on it at the moment, check www.space-weather.com for an up to date listing of active visible sunspots. If there are sunspots and you cannot see them on the shot you may be overexposing, dial in a faster shutter or up the f setting to as high a number as it will go and try again.
The darker dots are the sunspots. I’ve also added a little false colour to make the shot look a little more like what people expect the sun to be.
It’s possible using www.space-weather.com to identify the sunspots and label these up on your shot.
That’s all there is to it, it’s not that difficult with some pretty normal bits of photo equipment and take the proper precautions and you’ll be fine. Do please remember though, never look at the sun through the camera viewfinder, even with the filter on place and never leave your camera focused on it for long periods of time. Have some respect for the subject and you’ll be fine and get a shot of something not that many ever attempt.