In this picture the blades are covering all the holes, but three more need to be fitted. I'm laying the blades clockwise. The first two blades that had been fitted can be pivoted toward the middle, thus exposing the next hole for the next blade. Make this blade fit under the first two blades.
Here is blade #9 of 10 going in. It will fit underneath the three blades that have been pivoted toward the center.
All done. Just don't sneeze or cough before putting the top piece in place to hold it all together.
This was a Cine lens aperture, about the size of a quarter. A large format mechanism is much easier.
Yikes. This is more complicated than I thought. Thank you.
How do you know which blade to put on first, and how do you know whether they go on anti-clockwise or clockwise ?
You've recemented lens elements, this way less complicated to meOriginally Posted by Kevin Crisp
You look closely at how they're configured when you take the thing apart, photograph it, and you'll have a reference.
The most common failure is when someone forces the aperture ring and breaks the locating pins off of the blades.
It's really not all that complicated... Once reset aperture blades in a shutter similar to yours. At the time instructions were impossible to find. First evening was tired so had a cup of coffee - bad idea. Finally fixed the blades. Memories are that it took a lot, I mean a lot of patience, but it wasn't all that complicated in retrospect.
That could apply to so much of this forum.
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