I have nicknamed it my B1(or 'Beast 1') my go to landscape lens through which I capture around 95% of my landscapes, sunrises & sunsets. I do use a Wonderpana Filter system on the front and have GND and a couple of NDs to assist with the expose.

I have been using it on my Pentax K1 and K1 mk2 for a couple of years now.

Btw, I do have B2 and even B3...the 70-200mm and the 150-450mm which I use most for theatre work.

The one that gets the most use is definitely B1 as I love being out and about, amid Creation shooting those very special moments.

HD Pentax-D FA 15-30mm F2.8 ED SDM WR Reviews - D FA Zoom Lenses - Pentax Lens Reviews & Lens Database