Large FOV

My large field of view setup consisted in a Nikon D810 with the Nikon 105mm f/1.4 lens used at full aperture. This unusual setup was chosen in order to be able to collect as much light as possible during the eclipse to get the best signal to noise ratio. The short exposure time imposed by the fast f/1.4 aperture and the short focal length allowed to use a simple tripod without tracking.

Altogether, more than 120 images were acquired during the totality, resulting in a 100 seconds of cumulative exposure. The main difficulty in the processing of such image is the subtraction of the blue sky background which is much stronger than the outer corona.

On the final image, the solar corona is visible as far as 30 solar radii is visible. At this distance, the solar corona is clearly elongated along the direction of the ecliptic. Magnitude 11 stars are visible, resulting in hundreds of stars over the whole image.

DSC_0569A single raw exposure (high res here): the Earthshine is clearly visible as well as Regulus, Mars (on the right edge), and many individual stars. 

corona raw_ok2Black and white image showing the full extend of the solar corona (high res here) going as far as ~30 solar radii, and hundreds of background stars down to magnitude 11.





%d bloggers like this:
search previous next tag category expand menu location phone mail time cart zoom edit close