the Technique and a manufacturing techniques. Modern photo-electric eksponometry

you are: the Technique and a manufacturing techniques

Modern photo-electric eksponometry share on following types: with a selenic photo cell (' Лешшград-4 ', ' leningrad-7 '), electronic with the light-emitting diode indicator, with the photoresistor strelochnym the indicator (' Leningrad-6 '), last Two types eksponometrov demand a source питания.

In overwhelming majority of natural and interernyh shootings quite enough selenic eksponometra (the devices which have been built in cameras, for example, in ' Zenith ', concern this type) - it is easy, small on the size and is rather cheap. So, ' Leningrad-7 ' has the sizes 60Х80Х HZO mm and weight (with a case) about 100 Others eksponometry differ a hypersensibility, they can measure very small light exposure of objects when endurances in tens minutes are required. These devices essentially are more difficult and more expensive.

The Important accessory at shootings are blendy. Most effective of them - deep, it is good matirovannye and corrugated inside. But with success it is possible to manage and more compact blendami; for telephoto lenses it there can be simply short cylindrical tubes with zachernennoj an internal surface.

On some objectives blendy are issued by the industry. At their independent manufacturing it is necessary to make simple calculations, well-known and repeatedly published.