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Hold down ring for oly 90 f2 auto macro "preview "
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PostPosted: Tue Jul 26, 2022 10:50 pm    Post subject: Hold down ring for oly 90 f2 auto macro "preview " Reply with quote

So my favorite macro lens is the Olympus OM 90mm f2 Auto-macro. I had been using it manual focus but thought I would try the techart AF system with it. That presented a small problem. Typically in manual focus I would hold down the preview button on the lens to close the aperture which worked....but wasn’t optimal. I tried using a rubber band to hold it down but that was fussy. In AF it became too much. I needed a way to positively hold the button down but not damage the lens in any way. Something I could use and take off if I wanted to use the lens on my OM 4 body. It also could not interfere with the release button that was opposite the preview button or the aperturering turning freely as well. So I decided to solder together a copper ring with a little open box to fit down over the button. Very tight quarters! The lens releas button is maybe a mm from the edge. It's ugly but it works just as intended.