SineImage YE0148 LENS FOCUS TEST CHART (36 SECTORS) 16:9
|
Model |
YE0148 |
|
Type |
Reflectance/Transparent |
|
Size |
280 x 157.5mm |
|
Ratio |
4:3/16:9 |
| Material | Film or HD photographic paper |
The Sineimage YE0148 test chart is designed for
• adjustment of camera lenses
• checking back focal distance
With the aid of a low transmission filter and by means of low level lighting make sure that the camera is not over modulated with the aperture in the open position.
a) Optical focus: Adjust focus of zoom lens at greatest focal length.
b) Back focal distance (lens): Adjust focus at shortest focal length by regulating lens mechanically with adjustment screw and optimize alternatively with a).
c) Back focal distance (pick-up tubes): If focus varies from channel between greatest and shortest focal length, the individual pick-up tubes must be adjusted mechanicallyin the optical axis.
1. Select white channel. Set optical focus at greatest focal length and divergent focus adjust the pick-up tube in W-channel until optimum focus is achieved. If necessary optimize by alternative with optical focus adjustment.
2. With unchanged optical focus adjustment and shortest focal length the red and blue pick-up tube until optimum focus is achieved. Image focus (focus adjustment) is maintained at all focal lengths (zoom-in) and constant distance from object by means of back focal distance adjustment.
