Wide application: This adjustable aperture diaphragm is suitable for cameras, microscopes and other machines, which can help them work better.
Materials: The opening diaphragm is made of aluminum alloy and stainless steel, strong and sturdy, with very performance.
1.5mm to 25mm:The opening has an outer diameter of 55mm and an adjustable inner diameter from 1.5mm to 25mm, which provides small holes with different optical system to meet different light transmission requirements.
Simple operation: just use the handle to change the diameter of the opening diaphragm, which is easy to operate and more directly for adjustment.
Highly Stable: This diaphragm is lightweight, will not add extra weight for optical systems, with high strength, and resistance, very stable.