I don't have an OM 100/x.x but the 50/3.5 macro has only 6 blades as
does the 90mm/2.5 Vivitar macro.
Chuck
On 8/27/2014 11:04 AM, Ken Norton wrote:
Both are excellent and with good bokeh but I especially like "and closer".
But I was surprised to see that the 100mm Leica macro only has 6 aperture
blades. I would have thought at least 9 with circular profiles for such an
expensive lens. The only Leica glass I own came with a IIIf that I
"inherited". There's a 50, 90 and 135 and all have so many aperture blades
I can't accurately count them. I think it's about 18 and they make a nearly
perfect circle as they close down.
Leica copied their design from the Olympus OM 100/2.8.
:)
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