Originally posted by Vantage-Point They are the HD DFA 20-35 mm F4 WR ( with or without SR),
I heartily agree with this- the FA was a very good lens. A smaller, less expensive alternative to the DFA 15-30mm is needed for a WA FF zoom lens. It would also complement the upcoming DFA 21mm prime lens. Instead, for APS-C Pentax has gutted the less expensive alternative to the DA* 11-18mm f/2.8, which was the DA 12-24mm f/4 and without any replacement in sight!! I don't get what "with or without SR" means.
As to 58mm f/1.7- the old "F" 50mm f/1.7 was excellent glass, and could simply be reissued to include HD and WR and a DC motor.
As to an 80mm f/1.7- the FA 77mm f/1.8 Limited is small, light, very well designed and built. A real marvel of engineering, a great lens. The 77mm focal length is really a tribute to precision and honesty, in that many 80 or even 85mm f/1.8 lenses on the market actually have been tested to be below 80mm. That Limited lens tested as right on the money accurate. Perhaps upgrading with HD and WR might be a good idea.
As to APS-C, I think the old and flawed DA* 16-50mm f/2.8 could be discontinued, and Ricoh Pentax might successfully strike a deal with Sigma to rebadge a Pentax HD WR edition of their very fine EX DC HSM 17-50mm f/2.8 and 10-20mm f/3.5 for Pentax to fill these needs in their lineup.