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Forum: Pentax SLR Lens Discussion
08-13-2016, 03:57 AM
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I owned this lens for a while and had exactly the same problem. Long story short, it's not actually a problem!
When you take in such a huge view of the world, it's inevitable you are going to be seeing bright patches (like the sun), and dark patches (E.g shadows). On the k-3 (where I used this lens most), the images would usually appear dark 99 times out of a hundred, and initially I tried to compensate by increasing the exposure. That just led to huge blown highlights around the sun. In the end, as I recall, I actually ended up using it at -0.3ev most of the time, and then compensating the shadows in post.
The sigma 8-16 is a great little lens, sharp, stupid wide, and with great colours; however it is not a lens for jpeg shooters. I can say that the 12-24 Pentax lens didn't have the same metering problems (possibly because the coatings were better able to cope with direct sunlight?), however the image quality was distinctly sub-par when compared to the sigma - the Pentax was always a little mushy. At 15mm, the DA15 limited came out on top mostly, but then you'd expect a prime to do just that! All in all, the sigma 8-16 was a fun lens, the only downside to it is that it's not as small as the DA15.
So yeah, tl;dr, metering is an issue with the sigma, but it delivers at that ultra wide end. At the narrower end, the DA15 comes out on top, but not my much.
---------- Post added 08-13-16 at 12:01 PM ----------
Oh yeah, forgot to mention. Pentax cameras seem to expose for highlights rather than shadows. Having one super bright spot in the frame will make the camera adjust the exposure to prevent clipping in the highlights. The rest of the frame will then appear dark, but you can adjust the curves later on, and get some great results.
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