Hi Daniele. Congrats on your first Merlin! There are a number of very good learning points in this image.
1. Pay attention to potential exposure problems when composing an image. Here you had a dark subject against a bright BG. You correctly recognized that you needed +EC, but you probably needed another full stop. Take a quick scout frame and adjust your exposure accordingly. You should only be concerned with proper exposure of the bird.
2. A cardinal sin with high-megapixel crop sensors is to underexpose your darks. Recovery almost always results in very high noise levels.
3. The 300mm f/2.8 takes a 2x very well, but I would think about stopping down to f/7.1 or f/8 to get the best image quality out of the combination.
4. The maximum horizontal dimension for an image on BPN is 1024 pixels wide. ;)
Here's a repost that attempts to correct the exposure.
