Some mirror devices. Application of an ultra-violet optical filter

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But visible simplicity of shooting in mountains is deceptive. Thoughtless shchelkane leads to occurrence monotonous, pale, inexpressive ' cards ', only bearing a faint resemblance to magnificence of nature. First of all, such shooting is very uneasy technically.

Because of extraordinary cleanliness and a transparency of air illumination in mountains very contrastly, therefore it is necessary to take special measures for contrast softening: to give, for example, notorious perederzhku at shooting and nedo-show black-and-white films a little. Other feature - the ultra-violet radiation appreciable already at heights more 2 000 m that leads to surplus of bluish, cold tones on colour slides. Application of an ultra-violet optical filter in these conditions is especially desirable.

But the main difficulties not technical, but graphic character. Here it is hard to get rid of excessive diversity, to allocate the main thing in each shot. One of widespread errors - hobby korotkofokusnoj optics. SHirokougolnyj the objective does remote plans farther and small, the prospect habitual to an eye is deformed.

Certainly, in many cases shirokougolnik it is irreplaceable, but its application demands care. As cautiously it is necessary to apply flavovirent optical filters so habitual in flat conditions. Reducing brightness of the sky, they simultaneously remove air to a smoke, depriving a mountain landscape of dimensions, and strengthen and without that excessive contrast.