Lens information

I don't know a whole lot about Pentax lenses and I was wondering if someone could clarify what DA and DFA means? I have seen that Pentax have a 200mm DFA and 300mm DFA prime lens coming out next year, I am quite excited about that except I would like to know if they are going to be priced outrageously like the 300mm 2.8; I dont expect anyone would know that at the moment though.
Also what does limited mean with their lenses, does that mean its not a permanent lens in their lineup or is it just a name?
Thanks for your help.

Pentax have not yet stated what aperture the 200mm and 300mm lenses will have, so it is impossible to forecast the price with any certainty.

However, in my view the 200mm will most likely be 1:2.8, and I would guess at around 1:4 for the 300mm, in which case expect a price of around £1,000 to £1,500 each. If the 300 is 1:2.8, take out a second mortgage.

DA lenses are digitally optimised lenses for the smaller image circle of the DSLRs. D FA lenses are digitally optimised, but will fill a 35mm frame, and can therefore be used on film cameras. Remember film?

Both these lenses are likely to be of the very highest quality, and, as I have said elsewhere, I would expect them to have in-lens focussing.

G