The term “fresco” is understood to be a letter on the raw limestone base by paints diluted with water or paints having a lime binder (lime mortar, lime water). The calcium oxide hydrate contained in the lime paste and, therefore, in the lime solution, is the main element of this technique, which, entering into a chemical reaction with carbon dioxide in the air, forms calcium carbonate — a transparent vitreous structure that, penetrating the entire layer of soil and paints and forming a thin transparent film on their surface, fixes (cements) both the entire soil and the paint layer of the fresco, which it also protects from weathering. Continue reading
Astrophotography is considered one of the most technical genres of photography and may seem difficult for the inexperienced. But if you want, even a novice photographer is able to convey the night skies in all its glory. This is not as difficult as you might think!
The astrophotographer Mahmoud Alsawaf (© Mahmood Alsawaf) explains how to avoid some common mistakes that everyone makes at the beginning of his career when shooting astrophoto, and also shares practical tips on how to shoot the Milky Way or the star trail.
If you have failed astrophoto, what is the error? Continue reading