Originally posted by Reed And then out of the blue Tamron comes with new line of SP35/45/85 1.8 primes that are almost zeiss quality in optics. But I don't think it was Mr. Hirakawa work, but you can still sense his "design ethics" in these lenses
Curiously, I don't sense much of Hirakawa's "design ethics" in any of Tamron's lenses, regardless of whether Hirakawa may have been involved in their design or not. Tamron has its own design ethics that differs in some respects from Pentax's. Essentially, Tamron is an economy brand. They attempt to make lenses that perform nearly as well as Canikon equivalents but at a significantly lower price point. The Tamron primes may seem rather pricey for economy lenses, but that's because they're chasing rather lofty numerical spec goals. Of course they're superb lenses, and in terms of sheer numerical specs, may be a tad better than the FA limiteds, but they're not attempting to achieve the special rendering goals of Hirakawa's Pentax inspirations. The Tamrons are fully modern lenses designed for high resolution digital cameras, whereas the limiteds are proudly old-fashioned throw-back lenses, sans focus motors, VR, and WR. The FA Limiteds weren't even designed for digital cameras, and it sometimes shows.
It's one thing to use Tamron for some of their zooms, but I don't see Pentax using any other lens maker for its primes. Zooms involve optical compromises that affect the character of the rendering, so Pentax can live with non-Pentax designs for zooms. I don't see that happening with primes. Pentax will use its primes to demonstrate its image-centric (in terms of subjective human perception) lens design philosophy. Hence we won't see any Tamron rebadges among the primes.