Nikkor 55 3.5 Micro auto-compensation?

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glassJoe Junior Member • Posts: 38
Nikkor 55 3.5 Micro auto-compensation?

I’m the proud owner of an early 55 3.5 micro Nikkor with the auto-compensating diaphragm - it is one of my favorites. Does anyone know how much the aperture is opening up beyond the indicated f-stop? My understanding is it varies depending on how close you focus in. The barrel is marked with some kind of scale, but I can’t interpret it. I was hoping to find a chart online, but so far no dice. Thanks in advance for your help.

 glassJoe's gear list:glassJoe's gear list
Nikon D7100 Nikon AF-S DX Nikkor 35mm F1.8G Nikon AF-S DX Micro Nikkor 40mm F2.8
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