[Canon EOS 5D II + 40D | EF 16-35mm f/2.8L II + 70-200mm f/2.8L IS II] [Fuji X-Pro1 + XF35mm f/1.4]
Basically it's the construction of the lens whereby the blades overlapped each other to
form the aperture and the irregular opening is normal.
Most 35mm format lenses aperture blade more or less inherent such problem. But yet, I hardly encounter such problem happen in those 120mm format lenses aperture blade.
Maybe I'm wrong too.
Last edited by Spectrum; 17th September 2008 at 11:45 PM.
Having a regular aperture shape means tighter parts specs, perhaps additional QC/QA process which only translates to additional cost.
These lens makers can produce perfect aperture shapes if they want to, but it will be costly.
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