Deal all,
Please participate this thread if you have the lens, too.
Occasionally, I found my lens' real aperture diameter was different from my friend's.
The first picture shows the two lens apertures are in F45, but the diameters are different.
The aperture of the lens in No.5 Universal Synchro Shutter is obviously smaller than the lens in barrel.
F45:
Shutter aperture Diameter is about 7mm.
Barrel aperture Diameter is about 11.5mm.
F32:
Shutter aperture Diameter is about 10mm.
Barrel aperture Diameter is about 15mm.
F22:
Shutter aperture Diameter is about 13.5mm.
Barrel aperture Diameter is about 18mm.
F16:
Shutter aperture Diameter is about 19mm.
Barrel aperture Diameter is about 23mm.
F11:
Shutter aperture Diameter is about 27.5mm.
Barrel aperture Diameter is about 33mm.
F8:
Shutter aperture Diameter is about 38.5mm.
Barrel aperture Diameter is about 43mm.
F6.3(wide open):
Shutter aperture Diameter is about 52mm.
Barrel aperture Diameter is about 52mm.
The front and rear groups can interchange to each other.
The shutter barrel and the barrel's length without glasses are the same: 50mm.
I was totally confused about the apertures.
Help~
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