It's been 18 years since I shot Pentax, (besides the MF line), and I am not as familiar with their modern lenses (and non Pentax brands).
From what I can tell, Pentax, has 4 main Full frame lenses,
15-30, 24-70 (both appear to be either made by Tamron or are based on the Tamron equivalents)
70-200, and 150-450,
They also list the 100mm Macro.
When I look up Sigma and or Tamron, latest and greatest, sadly I only find the 35mm 1.4 Art from Sigma, and really none of the Tamron lenses. I assume some of this is due to expected sales volumes and the fact that since Pentax as sensor based stabilization, it adds a possible problem for the companies like Tamron and Sigma. One of my favorite Tamron lenses on Nikon is the 70-300, I know it's around a 500.00 dollar lens, but it can produce some great shots. Tamron makes a different 70-300 with a Pentax mount but it appears to be a different lens totally (elements and groups).
I realize there are a lot of older Pentax K primes out there from the ME, MX and other full frame film bodies
Just curious what others are using with the K1 and what they are finding. The K1 is a major shakeup, (at least IMO) over both any Canon and Nikon offering currently in the field (unless you are looking for high frame rate bodies), and the K1 has a huge amount it's offering for the price point. The main failing for me is the lack of lenses and the fact that adaption of Canon or Nikon glass won't work.
For a start, what are the opinions of the 15-30 and 150-450?
Thanks in advance.