Pentax C70210HK دليل المستخدم

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Manual Iris Lens

C70214 2.8 mm Manual Iris Lens (Iris Range 1.2 – C)
C70409 4 mm Manual Iris Lens (Iris Range 1.2 – C)
C70807 8 mm Manual Iris Lens (Iris Range 1.2 – C)

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GLOSSARY OF TERMS APERTURE – An opening or hole through which light passes. In the optical system it is equal to the diameter of the largest entering beam of light that can travel completely through the system. This may be equal to the front lens of the objective. MAXIMUM APERTURE – The largest size to which the iris diaphragm of the lens can be opened. (The lowest f-number) IRIS – The lens “iris” is a mechanical device for controlling the lens aperture (lens o