Originally posted by Storm Chaser What ever you buy make sure you do all kinds of test on your new lens. Bought a Samyang 14mm 2.8 and was very soft over all on a K5IIs.
Yep, this is important, especially for third party lenses. My Samyang 14mm is a bit decentered, and I returned the first copy I got for the same reason.
I have the 14mm for a while, some years, but I wanted something not as wide. I almost got the Samyang 24mm, but then through the grace of a forum member here found a good copy of the DA 21mm. I only shoot APSC cameras, and the 21mm FoV is more comfortable, better for everyday stuff and most landscapes. 14mm is reallly wide, even on APSC. The DA 21mm has many good points, but its probably not the best choice for astrophoto (coma, f3.2, not FF). I only know about APSC, though, and I did my research before the Samyang 20mm was announced. If starting today, I would probably get that one. But I dont regret ending up with Samyang 14mm, Pentax DA 21mm, Pentax M 28mm as my wide angle lenses.