They are indeed the same lens but front element is somewhat hidden by
plastic barrel which makes the DA a f/2.4 lens.
Though, I read a couple comments (was it here or on PentaxForums?)
that in practice, (comparing directly the two lenses and noting the
exposure recommended by the camera) the f/2.4
Has anyone compared the two?
I see the optical formula is the same,
but simple computer graphics tell only
a small and generally meaningless part of the story.
Sincerely,
Collin Brendemuehl
http://kerygmainstitute.org
He is no fool who gives what he cannot keep to gain what he cannot lose
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