Pentax K-x andPurple Fringing has always been bothering me. When I see a scene with interesting lighting, I always don't remember a thing about CA/purple fringing in the result image. I can't see it coming upon review of the images at the scene. I should have known better. I have various Tamron zooms and though some of them are my favorite, they are not immune to purple fringing and CA. Many people rely on post processing to clean them up. I rather not have them in the first place. I have used both Tamron and Sigma zooms and primes in various focal lengths, I seem to get much less from Sigma. It begs the question why I have more from the Tamron brand. I am planning in a distant future to upgrade my zoom to the latest Tamron 70-200mm f/2.8 and I surely hope it does better than other Tamrons in terms of CA control. And I hope there is better alternative in the Pentax Brand with similar pricing. The Pentax DA* 60-250mm f/4.0 will be ideal but it is out of my comfort zoom for pricing.
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