Aperture bound tester KO-400
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Lens iris diaphragm dynamic characteristics automatic measurement for single lens reflex cameras |
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All iris diaphragm angle is set up and it is automatic measurement about dynamic characteristics. |
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It is logarithmic transformation about moving time of an iris diaphragm, and change of the iris diaphragm quantity of light. |
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It changes into the wave of 1 [EV]/Div, and is made graph |
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A setup for standard, and control a display of a measurement wave by PC. |
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| Overview |
This instrument measures aperture bound. Sets angle of aperture lever by pulse motor of two axes. Converts operation time of aperture and change of quantity of light of aperture into wave pattern of [EV]/Div.
Setting and control indication of measuring wave pattern are performed by PC. |
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| Specifications |
| Measurement Subject |
Lens |
| Measuring item |
Aperture bound |
| Measurement method |
Moves aperture lever and measures the change of quantity of light.
Opens aperture and waits at appointed aperture position by pulse motor of two axes.
Memorizes and analyzes wave pattern by A/D convertor 12[Bit]/10[µS]x10000[Sample] |
| Measuring range |
Max 9[EV]from open
Measuring time(memory)100[ms](10µsec resolution) |
| Mesuring accuracy |
Aperture position mechanical precision: ±0.1 degrees
Aperture wave pattern precision:3[%]
Luminance surface:150mm angles , Min 2000[cd/m2]
Uneven luminance value:MAX 7% |
| Measuring resolution |
Aperture position angle setting resolution degrees 0.0036º |
| Power supply |
AC100V-240V(Full), 50/60[Hz] |
| Environment for use |
[Temperature]+5ºC-+40ºC [Humidity]MAX 80% |
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