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| Distance | 314 Kilometers |
| By | Alessandro De Benedictis |
| Camera | Nikon D750 @ ISO100 – 10” |
| Lens | Tamron SP 150-600 mm F/5-6.3 Di VC USD G2 @ f./10 |
| Date | October 08th 2019 |
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Who could ever imagine that you can see Corsica from Rome?
But yes, you can! And thanks to Alessandro we now know that one can see it really well! Impressive clear contidions on this day allowed for a crispy view down to the horizon.
Achieving such a long line of sight, over the sea, is always a little bit harded than over terrain. Evaporated water will create a more humid air along our view, blocking the observation of long distante targets.
However, under clean conditions, this can be done. These conditions usually happen when dry air is blowing over the area or a high pressure system is “pushing” all the air down to the surface.
One case or the other, this is what you can see in the picture!
And, of course, the map of the situation:
Beyond Horizons 
Congratulations!
Best conditions created by glowing sky after sunset, what made perfect contrast with the land.
http://www.mkrgeo-blog.com/horizontal-visibility-as-a-main-factor-of-long-distance-observation-part-1-weather-astronomical-and-optical-elements/
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Yes Marius. I had read your articles some time ago, the factors to which you refer are very well explained and with many comparative photographs on degrees of luminance and turbidity. It reminded me in large part the studies that in this regard had been carried out in the attention of the landscapes of the national parks of North America https://www.epa.gov/visibility/visibility-parks-and-wilderness-areas , where appropriate, with special emphasis on the factors of polluting aerosols.
We, independently, have also been aware of these peculiarities so interesting that you describe well and personally I can say that many distant horizons opened up to my eyes when I decided to set my bed alarm earlier to climb the mountains before the sun came up. : -). There is a saying in Spanish that says “who gets up early, God helps”: -) and this also applies to contemplate landscapes.
I also realized in my first observations that a sky almost entirely covered by clouds (except the horizon) is what sometimes allows us to see the most distant silhouettes; In my case I have always called it “scenic effect” when the sun illuminates only the distant mountains, as for example in a work of art where lighting technicians only focus the stage of the performance (if they only illuminate the seats of the public is caused by the counterproductive effect) or “screen effect” (although this second term already existed) when the light illuminates only the sky behind the reliefs.
As for the air masses, in our Mediterranean area, the continental mass is almost always very negative, only in very few cases, it was efficient (for example here the silhouette of Mallorca affected by an advection of Siberian origin in this report from a personal blog of mine https://horitzonsllunyans.wordpress.com/category/des-de-barcelona/mallorca-des-de-montjuic-i-nevada/) and on the other hand the Atlantic masses are favorable, although equally preferred of arctic origin. Every geographical area of the world obviously has its peculiarities.
Salutations.
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