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Sunspots

I was testing the solar filter for the camera, in preparation for Monday’s eclipse. We won’t be seeing the total eclipse, but I’m hoping to get some good shots of the partial.

As I was processing the results, I realized I’d captured sunspots!  (Those dark spots in the upper left.)

Sun with sunspots

Click to embiggen.

For those who wonder about such things, this was taken on the 100-400mm lens, fully zoomed to 400mm. ISO 640, f/10, with a 1/3200 shutter speed. I had to set everything manually, because the camera overexposed the shot if left to its own devices.

I think next time I’ll try to reduce the ISO down to about 100 and see if that gets rid of the minor graininess.

Processing involved cropping the shot, noise reduction, and an orange overlay.

Mirrored from Jim C. Hines.

Comments

( 1 comment — Leave a comment )
kk1raven
Aug. 17th, 2017 01:04 am (UTC)
Reducing the ISO to 100 sounds like a good choice. I don't have a solar filter, so no sun photography for me, but what I've read about it recommends using the lowest ISO setting offered by your camera.
( 1 comment — Leave a comment )

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Jim C. Hines
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