Originally posted by Matthew Saville This seems to be where all the action is right now, so I'll post here as I am not a regular visitor and don't know my way around the various forums, or which of them might be ghost towns right now:
After reviewing the K-3 for SLR Lounge over a year ago, I'm still highly tempted by Pentax, and now the K-3 II is coming. As an astro-landscape and adventure photographer, The K-3 and K-3 mk2 are EXACTLY what I'm looking for in a DSLR; every one of the features that people have listed here as "not exactly deal-sealers" for current K-3 owners are right up my alley, and extremely tempting.
Unfortunately, as a Nikon owner I keep forgetting which lenses are available for a Pentax astro-landscape shooter. Can anybody give me a quick breakdown for astro / landscape lenses that would go well with a K-3 II?
(I know there is a very complete list here, and on B&H, but I'm interested in things like field curvature, coma, etc.)
I'd love to see a weather-sealed 16mm f/1.4 APS-C lens, but that probably won't happen any time soon.
I've owned the Rokinon 16mm f/2 and it is incredibly sharp; in fact I sold my copy of it here on PentaxForums last year. Whoops.
I'd strongly consider the Rokinon 10mm f/2.8; but wish it were 8mm or 9mm, if I'm going to forfeit front filters. Oh well.
I'm perpetually bummed out that there are Zero Tokina lenses available on Pentax, especially the 11-6 and the new 11-20. I'd settle for an f/4 ultra-wide zoom, especially if it had low field curvature and had weather sealing. I know there are adapters for Nikon F-mount lenses, but they don't allow focusing at infinity which is a show-stopper for me obviously.
I loved the 15mm f/4's size and weight; but it had some pretty incredible field curvature which made it un-usable for anything other than far-distance shooting at f/11-16. Maybe I had a lemon?
I like the idea of a combination of ultra-light lenses such as the 15mm f/4, and fast-aperture lenses such as the 16mm f/2, so that I can save weight when possible, and shoot astro when necessary. This is something that Nikon, Canon, and even Sony's mirrorless offerings seem to be largely neglecting.
All in all, I'd pre-order a Pentax K-3 II tomorrow if I could sell my Nikon DX gear at a fair price. And if a full-frame version of this exact camera, maybe with the Sony 36 MP sensor stolen from the D810, (and a few less FPS to be fair) ...I'd be a raving Pentax convert in a heartbeat.
=Matt=
The 12-24 is pretty good, not weather sealed.
It is interesting to read another perspective; we know the shortcomings of our hardware since we use it, and when we read specs we are looking for what we want. And being the internet, we blather on and on and on....
The specs I'm looking for won't show up until people start pounding on it; IQ and AF. The K3 is a very nice performer and has given me great results, and an improvement on those two things will make it very very interesting. The rest is gravy.