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Unamed 4/5 inch (Estimated) Stereo lens pair, in brass panel. No Iris Diaphragm – MW Classic Cameras
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Lens–iris diaphragm retropulsion syndrome during phacoemulsification in vitrectomized eyes | Semantic Scholar
![Unamed lens with Iris Diaphragm in a Non-Working Koilos shutter. Glass diameter is 37mm. Shutter diameter is 100mm – MW Classic Cameras Unamed lens with Iris Diaphragm in a Non-Working Koilos shutter. Glass diameter is 37mm. Shutter diameter is 100mm – MW Classic Cameras](https://mwclassic.com/wp-content/uploads/2020/07/mwclassiccameras-20200710-98.jpg)
Unamed lens with Iris Diaphragm in a Non-Working Koilos shutter. Glass diameter is 37mm. Shutter diameter is 100mm – MW Classic Cameras
![Old, vintage film camera lens close up macro shot. The iris diaphragm of old camera lens Stock Photo - Alamy Old, vintage film camera lens close up macro shot. The iris diaphragm of old camera lens Stock Photo - Alamy](https://c8.alamy.com/comp/2F9RPKB/old-vintage-film-camera-lens-close-up-macro-shot-the-iris-diaphragm-of-old-camera-lens-2F9RPKB.jpg)
Old, vintage film camera lens close up macro shot. The iris diaphragm of old camera lens Stock Photo - Alamy
![1pcs Aperture Adjustable 1.5-29 Mm Iris Diaphragm M42 To M42 Cs To C Camera Lens Module Adapter Ring - Microscope Parts & Accessories - AliExpress 1pcs Aperture Adjustable 1.5-29 Mm Iris Diaphragm M42 To M42 Cs To C Camera Lens Module Adapter Ring - Microscope Parts & Accessories - AliExpress](https://ae04.alicdn.com/kf/Sd0bf71d7d2734b05992a2477645af95fT.jpg_640x640q90.jpg)