Re: EOS EF 400mm f4 DO

[Sir Douglas the Fearless]

> > you should see in the front of the lens, you can see the diffracting
> > rings.
>
> Can you tell more about the area in which you can see those rings and
> their spacing? I'm curious about how diffractive it is.

from what I remember, the rings appear to be about an 20-40mm from the front
element and about 3-4mm apart

Douglas


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