Originally posted by mariakruse .... I want maybe a 35mm macro down the road....
Hi, you mentioned you might want a 35mm macro. I would strongly recommend the DA 35 f2.8 Limited. A totally brilliant macro lens, with the added bonus of being a very good general walkabout lens also. Stunning colours and contrast, astonishing detail, and beautiful macro-range bokeh. This lens is truly a Pentax gem.
On zooms and primes, as several here have described, they both have their pros and cons.
However, ALWAYS REMEMBER that one of the core strengths of Pentax is their highly respected prime lenses. (This includes the older manual-focus Takumars.)
Personally, I use both the FA Limited and DA Limited ranges of primes, and they are quite simply without parallel outside of Pentax - here I'm speaking in particular of their "image rendering" qualities. I'm not talking so much of things like sharpness, abberations, vignetting etc. - every lens has their respective strengths and weaknesses when measured technically. Rather, I mean in how they subjectively RENDER an image in real-world situations; there's unique character in the way these lenses create stunningly beautiful pictures! I think that's something important, and you need to see the results to appreciate it. But once you do, you may find, as many here have, that there's no going back...
Without a doubt, one of the advantages of PENTAX is its legendary prime lenses.
On zooms, I have a DA* 50-135 f2.8. Like many others have said, this is a really special lens. It is weather proof, constant f2.8 max aperture, solidly constructed, and compact compared to a 70-200 (full frame equivalent focal length).
All that is true, but to me the REAL magic lies in the pictures! Despite several years of my using it, this lens continues to regularly impress me with the beautiful, impactful images it creates. It's probably due to the lens' unique cocktail of sharpness, colour, contrast and bokeh - whatever it is, the results are very eye-catching. An outstanding zoom lens!