I bought a 300mm f5.6 TeleCongo Lens which has not arrived yet.
The price was good, and I have read good things about the Congo lenses by Yamasaki.
I like fast lenses and f5.6 sounds really fast for 300mm.
So I went to find the manual for it. There are wayback machine archives of the Congo site.
But every reference to the 300mm TeleCongo lens that I found says it is f8, not f5.6.
So what does this mean? Is the lens some experimental thing or a one-off build?
Or maybe it is an older lens because the Wayback's oldest capture is 2004.
On the other hand all the other references I found said that the 300mm TeleCongo is an f8 lens.
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