This is an Iris mechanism where blades overlap such a way that base of the each blade is above of previous blade. This creates a problem in the animation when you want to place the last blade. I thought this would be an easy animation to make, it turn out to be challenging one. Finally I solved the problem by using masking and one extra blade. It has some minor problems, but it give you the idea of how this mechanism works.
Detailed instructions how to disassemble, repair and assemble broken aperture blades of famous tair-11 russian lens. Sometimes aperture is fall out and do not work . In this tutorial i'm explaining how to fix this problem by yourself. If you are looking for tested and adjusted ussr foto gear, please visit my eBay stores at: www.ebay.com/usr/kosbik84 www.ebay.com/usr/retrofotohouse