The
WR-designation means Weather Resistant, not Weather Sealed as the DA Stars are.
WR is a simpler and not as costly weather protection as the true weather sealing the DA Stars have. (same style of
WR as used in the 18-55 and 50-200 kit lenses).
Should work for most...
Pentax has only had one macro in the Star serie, and this was the FA Star 200 f/4.
The 100 and 50's never was Stars, but was part of the normal range.
Seems now that Pentax upgrades their prime lenses to
WR designation, with design elements borrowed from the DA 35 Macro. I expect the 14 f/2.8
WR to be released next year, we'll see...
The 100 Macro is not called Limited because it is too big for a Limited.
And the Limiteds won't be
WR because
WR adds size. The whole idea with the Limiteds is that they are the smallest and most compact
DSLR prime lenses that exist. So a Limited can not be big and can not be weather sealed or weather resistant, at this stage. For that, Pentax needs to shrink their size even more to compensate for the added size the
WR brings. And that would be quite an effort at this stage...
I don't see the D FA designation to the 100 Macro as a sign to a 24x36 digital from Pentax coming soon. The new 100 macro uses the same optical formula as the old D FA 100 macro, and this is for 24x36. Would be strange to call it DA when it is the same lens as the D FA in a new outer shell...
Oh and the new aperture design seems interresting.
