Originally posted by Douglas_of_Sweden What is most unusual to me is how sharp and contrasty it is a wide open. Of course all lenses lose a bit of these qualities wide open simply because wider apperture means more stray light beams, more or less a natural law, but this lens suffers less from that than other fast tele lenses I've tried. The A*135/1.8 is clearly more usable at f1.8 than the A*85/1.4 is at f1.4 (unless you want the 85 to go a bit soft for portrait).
Interesting, that's the first time I've heard this comment made vs. the A*85.
The A*85 has been shown to outperform the Canon 85L MkII wide-open, so that gives you an idea of the level of performance we are dealing with here.
Quote: You sometimes here that the A line were less well built than the M and K line. I think that is comming from a few plastic details in the most mass produced kit zoom lenses and the plastic internal detail that sometimes break in the apperture ring of the A50/1.7 and A50/2, but the rest of the line were pure metal and glass, and the A* lenses are as well built as any K lenses. The A*135 is a joy to focus, gives you a bright viewfinder and has a smooth focus throw.
As for why there is no DA*135/1.8. There never was a F* or FA*135/1.8 either. That is more of a mystery to me. For the DA line, I simply think that Pentax did not expect to sell enough of it having lost market shares throughout the 90's and being late into the digital age. With market share picking up with more and more K-x, K-r and K-5 bodies sold, I hope they will again launch some high spec lenses. But before giving anything similar to the A*135 I'd like to see the A*200/4 macro or FA*200/4 macro in a DFA* version.
I think the A* line represents the epitome of Pentax lens engineering. Sure there are some other greats in the FA* series, but from my understanding the engineers were given free reign when designing the A* series. For the later F* and FA* series they had to work with more limited budgets.