Observation by Chris Holt: Total solar eclipse, Spain 2026, promine...

Uploaded by

Chris Holt

Observer

Chris Holt

Observed

2026 Aug 12 - 18:31

Uploaded

2026 Aug 17 - 22:19

Objects

The Sun
Eclipse

Equipment

Canon EOS 550D
Sigma 400 mm f/5.6 prime lens, stopped to f/16
Ohnar right angle finder
tripod
Android tablet controlling camera over USB with OTG cable, running EclipseDroid

Exposure

ISO 100, 1/320 s

Location

Siguenza Castle, Spain

Target name

Total solar eclipse

Title

Total solar eclipse, Spain 2026, prominences and Baily's Beads 2 s before C3

About this image

As part of a large, organised eclipse tour, we had access to the Siguenza Castle parador, including the car park, which offered good views to the west and had been closed to vehicles. Knowing that totality would have a duration of under 99 s, I had prepared a script for EclipseDroid that ran through a series of exposures, beginning 18 s before C2 and ending 18 s after C3. This is one of those exposures. The only processing has been to convert from RAW to 16 bit TIFF in Digital Photo Professional and to crop and convert to JPEG in gimp.

Files associated with this observation

IMG_5914.jpg (142.6 kB)

Like this image

Andy Wilson, Dominic Ford

Comments

Grant Privett, 2026 Aug 17 - 22:29 UTC

Does Canon still impose a minimum time between exposures when running via a computer? Used to be 5 seconds - I suppose it avoided a filled image buffer messing up a download.

What was the 18s rationale? Longer and you risk internal damage to the camera?

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