It's not a DA designation, nor is it by Pentax. One of the best full fame lenses that WOULD have the DA designation if it were made by Pentax; is made by Sigma - the Sigma EX 24-70 f2.8

Also one of the more costlier lenses; certainly very heavy and quite large. Nothing quite like the 82mm front filter

It's unfortunate one can no longer find a new Zeiss in PK

Through *most* professional experiences one also has to note where the original photograph was taken and also where it will be published. In most instances; a photograph taken at a public venue can be published without releases if adults are the subjects. I've seen some truly interesting variations of this one

Guessing it's time to add another Metz 76 to my collection; while they are still around.

I've gone through many a flash unit in my career, have found Metz to be one of the best around, second only to Quantum. Unfortunately Quantum does not make a dedicated Pentax show/converter