Adjustable Iris Aperture Diaphragm M30 to M37 Iris Aperture Diaphragm Adapter Optical Diaphragm 1.5-26mm Lens Module Adapter Ring Optics PVS14

SKU: KF31.101

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This adapter can adjust the diaphragm range from 1.5 - 26 mm. 
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It's an adapter for different caliber lenses and filters, and an accessory for adjusting the amount of incoming light. 
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It is suitable for PVS14 monocular night vision equipment and PVS14 binocular night vision equipment, as well as other 30mm aperture equipment. 
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This adapter is mainly for manual control of the diaphragm, so it may not be possible to realize its full function in full-auto mode.