My astro+landscape solution for the K-1 is the 15-30 plus 28-105. The 15-30 is for ultra wide angle and astro. The 28-105 covers more distant landscapes. Both lenses are as sharp as a prime lens IMO.
I do not use filters on the 15-30. There are options but they are bulky and expensive. Circular polarizers don't look right at ultra-wide angles, anyway. I use the 28-105 when I want CPL or ND filters. That doesn't let me do a true ND long exposure wider than 28mm, but I can take multiple unfiltered 15-30 shots and average them to simulate long exposures.
I also have a DFA 100 f2.8 Macro. That works well with the astrotracer for Milky Way closeups.
Originally posted by Tas I'm surprised that nobody has mentioned the future release of a Pentax wide angle prime, but there is apparently one coming.
That's been on the roadmap for too many years. At this point, I think it's equally likely to be released, or unceremoniously removed from the roadmap. Sales might be low because people who needed a wide angle prime already bought Irix, Samyang, or something else.
Originally posted by StanT Rokinon FE14M-P 14mm F2.8 Ultra Wide Fixed Lens. After reading some of the comments here I am wondering if I made a mistake in ordering this lens?
Image quality from my copy is very good. The Rokinon (and similar Samyang and Bower 14mm) has complex distortion but that's more a factor for architecture with straight lines, and can be corrected with lens profiles in post-processing software. It's a much lighter and compact option than the Pentax 15-30. Note that I don't use my 14 much because I prefer the versatility of the Pentax 15-30.
A common issue with the 14 is miscalibrated distance marks on the focus ring; it was an early complaint and maybe resolved. If you focus with liveview zoom it's not an issue. If you focus with a hyperfocal reference chart, there are simple steps you can take to adjust the lens if needed.[COLOR="Silver"]
Last edited by DeadJohn; 09-15-2017 at 02:56 PM.
Reason: Fixed double post