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There are two interesting things from technical point of view about this photo. First of all, I used very high ISO of 3200. As you can see final image does contain just a little bit of noise and as I previously wrote using high ISO values isn't something that you should be anxious about when using modern digital camera. High ISO is there to be used. It's not just a marketing slogan. On my current camera I used even higher ISO values like 12800 (and even 25600!) and still got results that I was happy with.
The second thing is that I used exposure of 1/100 s despite using focal length of 300 mm. It's due to image stabilization built-in the lens I used (without it I would need to use exposure of 1/300 s). Nowadays IS systems are really powerful. In case of this lens I was able to shoot in the dark and still get sharp enough images.
Camera: Canon 5D MK II
Lens: Canon 70-300 f/4-5.6 L IS USM (read my review here)
Focal length: 300 mm
Exposure time: 1/100 s
Number of exposures: 1
E.V. Step: n/a
Flash used: no
Filters: circular polarizing filter
Software: Magic Lantern 2.3, Lightroom 5.0, Photoshop CC