Hi all,
Recently I separately obtained a Radar 12” barrel with an iris diaphragm, and a broken betax 5. After getting the shutter going again, I was looking forward to mounting the Radar, as I had heard it fit natively. Unfortunately the rear cell fits fine, but the front shutter threads are a couple of mm shy in diameter of fitting the front cell threads. The shutter is marked for f/5, so I assume it originally fit a Vesta?, but it actually came with a single element mounted to the front via what I think is a bit of a custom rig, although well-done. My question is whether the shutter as originally built should have fit the radar, and now I just have to figure out how to get an adapter ring loose (if so it’s well fit and very tight), or if the shutter originally came with different-size threads on the front depending on the lens it came with, meaning I just found the wrong shutter to work with the radar.
Thank you!
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