Originally posted by Mistral75 Just wait for the disclosure of the size of the roadmapped Ultra Wide-Angle Single Focus Lens and Large Aperture Wide-Angle Single Focus Lens (the latter a ★ lens).
Same cause, same effect...
I'm more tempted by the ultra wide-angle, and I hope it will be reasonably compact (it's not a "large aperture" lens). Otherwise I'd have the 15-30.
But let me put it this way: if I have to pay quite a lot on a high-end lens, and my choices were Pentax and Sigma, I'd rather have the Pentax. Say, the 50mm Art vs D FA* 50mm f/1.4.