This page is no longer actively maintained. (Pardon?)
This operating manual contains brief information about the light meter and rules of use. Before using the light meter read the operating manual carefully.
Photoelectric light meter "Leningrad 8" (Yu102) is intended for exposure determining while amateur photo and cine filming on black-and-white and colored photomaterials. You can work with the light meter at bright sunlight and artificial light, out of doors and indoors at the temperature from -20 to +45 degrees Centigrade.
|Light meter Yu102||1|
|Nozzle (milk glass)||1|
Photoelectric light meter consists of selenium photocell, gauge of permanent-magnet (metering) system with scales and scaling unit (calculator). The light meter has two measurement ranges for brightness and three ranges for illumination. Exposure or aperture is determined with the help of calculator. The calculator consists of two disks -- upper and lower.
On the upper disk there are: aperture scales from 1.4 to 22 and scales of photomaterial response from 2.8 to 1400 unities GOST (Russian abbreviation of "State Standard") (or from 3 to 1600 ASA) and from 6 to 33 degrees DIN.
Intermediate points by GOST scale correspond to meanings 4, 8, 16, 32, 65, 130, 250, 500, 1000 units of GOST.
Setting of photosensitivity magnitude is carried out with the help of warpage.
On the lower disk there is an exposure scale for the cameras from 1/2000 to 30 s, fractions of seconds are denoted by integers (instead of 1/2 s denoted a number 2 etc.); seconds are denoted by " (1" - 1 second etc.).
Moreover, there are two scales on this disk: scale of picture-taking rate from 8 to 64 frames a second with intermediate points 24 and 48 frames a second and an auxiliary scale with the numbers from 1 to 18.
The lower disk is connected with a ring of auxiliary scale setting. On the gauge scale there are numbers from 1 to 18: on the first measurement range from 5 to 12, on the second from 12 to 18 and on the third from 1 to 5.
The light meter corresponds to demands of GOST 9851 - 79
There are two main methods of exposure and aperture determining with the help of the light meter:
In order to avoid mistakes from heaven's light on natural shooting while determining exposure or aperture by method of reflecting light, it is recommended to stoop the light meter's window to land. The light meter "Leningrad-8" is an extremely sensitive measuring device, which demands to be used with care. At others opening angles it is necessary to apply correction. On old cameras the exposure and aperture scales can differ from the exposure and aperture scales on the light meter. In this case you need to set on the camera the meaning of exposure and aperture that is the nearest to the meaning of the light meter.
For your accommodation on the backside of the case there are two breaks, which allow fastening the light meter on the strap of the camera.
Protect the light meter from bumps.
At the temperature over 50 degrees centigrade the photo-cell can fall out.
The light meter must be kept in a closed case at the temperature from 1 to 40 degrees centigrade.
Protect the nozzle from dust and moisture.
If the nozzle or a glass is soiled, clean it with a soft fabric. Do not clean with spirit or acetone.
Repair of the light meter must be made in a special workshop.
As a result of a constant work on reliability improvement of the light meter, some insignificant changes can be made, which are not reflected in this manual.