Better edge, more flare resistence than the Sigma, say no more. Delivered as hoped for.
After looking at the test charts I realized the Sigma was softer on the edges, but still rated "good" or better. Raising the question "will the Pentax be better". Because despite the need for edges "good" or " very good" edges are usually found on lenses with excellent centres. The control of flare and better edges just puts this lens ahead of the class. And that would seem to be what many people are paying for these days.
I am a little curious though, as to why the SIgma folks, with all their loudly proclaimed drive to excellence in their "Art: series., isn't more competitive. As a landscape guy, the Pentax 50 is clearly the better lens to use, both for flare resistance (really important to the landscape photographer bread and butter, sunsets) and edges. Did the Sigma engineers hold back?
I expect Tamron and Sigma to produce just as good lenses for a lot less. Maybe not WR or the same build quality but I expect the optics to hold up, even if they need to be handled with more care.
I'm not rich, but based on this test, were I buying, i would definitely take the Pentax over the Sigma +$250. So I kind wonder where this leaves Sigma? And all those guys who can't stop promoting the Sigma Art series lenses. They are back in their historical place, which was lower price, lower IQ.
It was weird when the Sigma Art series started how long it took the other companies to respond to the challenge. But the disadvantage of being first, if every one else can design to be slightly better than your specs. A go big or go home kind of philosophy. It will be interesting to see how Sigma does, slugging it out with the Tokina version of this lens.
I guess a lot of folks who laid out a grand for the Sigma, now have to re-evaluate their decision. As a landscape shooter, I would be. For the Pentax shooters, patience has paid off, once again. In fact, it's getting to be kind of a theme. Since the K-1 came out there has been a lot less to whine about. Although the 150-600 shooters still have a case.
The question for Sigma now becomes, is $950 too much for "second rate". can they make money on this lens at $600, which is probably the most I'd pay, given the difference in quality.
Last edited by normhead; 08-06-2018 at 07:53 AM.