Startrails over Cerro Tronador, Patagonia 27th March 2013

3 Responses to “Startrails over Cerro Tronador, Patagonia”

1
James:

Love this image!

[Reply]

May 22nd, 2013 at 16:47
2
Matt Sandy:

I really want to go there some day. Any reason you made in black and white?

[Reply]

admin Reply:
June 10th, 2013 at 15:41

Thanks Matt. Actually the image is not Black and White, but the subject is :)

[Reply]

June 8th, 2013 at 21:41

CameraCanon EOS 5D Mark III
LensEF135mm f/2L USM
Focal Length135 mm
Aperturef/5.6
Exposure963 sec (16m 3s)
ISO800
Date Taken11 Nov 2012, 00:08

The story behind "Startrails over Cerro Tronador, Patagonia"

Here is a shot that took about one hour to prepare (not including the 6 hr drive and 5 hr hike/ski :) and 16 minutes to take. This is Cerro Tronador, an extinct volcano (though the area is still quite active) of 3400m/11,000ft. It sticks 1500m /5000ft above all neighbouring mountains and is covered in huge glaciers with thousands of crevasses (check Google Earth!).

I wanted to use my 135mm 2.0 lens for a long exposure to see how that would work out, but the preparation was a nightmare. There was no moon and the stars on this side were not bright, so live preview did not work when focusing on the pitch dark mountain. Even if I focused on the brightest star, the mountain would be out of focus at F2.0.
The depth of field is so limited (and it has the best bokeh ever) on this lens that even at a long distance it is difficult to get everything in focus. Infinity is never infinity at all (or maybe it is, but the mountain was closer than infinity) and even a slight tap on the lens would change the focus distance when at 2.0.

So in the end I had to stop to F5.6 to make my life outside on the glacier a bit more bearable and get the mountain as well as some stars in focus :)

Of course, this had the added problem of needing more time, but the added benefit of longer star trails. Instead of taking a series, I only took one image, 16 minutes, ISO 800, F5.6…

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