Adjustable external iris diaphragm for use with large format lenses that do not have their own diaphragm. All-metal construction with aluminum body and steel blades. Made in Germany, serial number is 19715.

Sixteen blades produce a perfectly round circle. Maximum diameter is 57 mm (2.24 inches), the smallest opening is 14 mm (0.55 inches).  The knob on the right-hand side (first and last picture) changes the size of the opening, the knob on the left-hand side locks the setting. 

The diaphragm is in good condition and is fully functional. 

Buyer to pay actual USPS shipping cost (no handling fee). Estimated shipping weight is 1 pound.

This item can be returned if not as described. Please inform me via E-mail no later than fourteen days after receipt of the item. After the item has been returned, I will refund the full bid amount. 

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I would be happy to combine several items in one shipment to reduce shipping costs. Happy bidding!