9/12/2023 0 Comments Sigma 18 35 1.8 pentax![]() ![]() And optimized power distribution helps correct various types of optical aberration. Lens construction - A single FLD glass lens, which boasts the same performance as a fluorite lens, is combined with four SLD glass lenses to minimize chromatic aberration.Well, this is not an option for me, as I don't use an SLR to be limited to life view.Īnd yes, IF the lens focuses correctly, it exhibits stunning image quality.Īctually better than some of my Pentax limited lenses! Shame I cannot use this and have to return to my old trusty Tammy 17-50 2.8 as a walkabout zoom. Yes, I also read (and can confirm) that it focuses well with life view. Thanks to Amazon for a hazzle free return policy! Shame on Sigma that this is still not fixed! There seems to be a number of other users with similar problems, since the lens was launched well over a year ago (I bought it in May 2015). Since all my other lenses focus better than ever on my new K3, I can positively say its not the camera.Īfter some more reading on the web, I realized I am not alone. Is this maybe Sigma's idea of an "art lens"? :) The only way to describe it is "Focus Lottery"! This lens mis-focuses in a way I have never ever experienced before, not even with the most crappy third party lens from 20 years ago! Since my Pentax K3 has a very useful focus fine adjustment, I thought "no problem, lets fix it". until I realized that practically no image was in focus! Didn't seem to match the razor sharpness everyone was talking about?! to have truly stunning image quality over a reasonable zoom range so no lens change is needed.Īt first, I couldn't believe how soft it is at f1.8. Well, this has been my dream since I take photos. I read a lot of glowing review of this lens, including on the (Amazon affiliate) and DXOmark.Įverybody praised the fantastic performance. With the limited zoom range and size and weight that cannot be ignored I consider this lens somewhat of a niche lens too limited to be a do all walk around lens but uniquely useful for certain applications and I am very glad to own it. There is some flair under certain conditions but this must be expected with 17 lens elements and so much glass.The build quality is equal to any Pentax lens I have. Focus is fast and quiet and it does not hunt. ![]() I have used this lens indoors without a flash but you must remember that at large f-stops the depth of field is VERY shallow and focus must be spot on to get sharp results. Sharpness is very good but at 35mm my FA 35 f2 is just as sharp except wide open. Now it focuses as well as any lens I have. Mine was OK at all focal lengths except 35mm which I fixed with a -5 setting at that length with the dock. Focus is a real issue with this lens and many have given up on it for that reason, though some seem to get a reasonably good one out of the box. The lens shade is a nice small diameter, unlike the monster on the 12-24 f4, which makes it nicer when in the backpack and not on the camera. Some have complained that the lens cap is difficult to put on and does not stay on well I find it takes a little more attention when installing but is not that difficult and stays on as well as any other I have. One thing that helps though is that it does not extend when zoomed. This is not a lens that I can "forget" is there. I carried it on a k3ii at the state fair for a full day and was always aware that it was there. The first thing is this is a large and heavy lens. I have had this lens for 6 months now and feel I can give a useful review. To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy Notice. You can change your choices at any time by visiting Cookie Preferences, as described in the Cookie Notice. Click ‘Customise Cookies’ to decline these cookies, make more detailed choices, or learn more. Third parties use cookies for their purposes of displaying and measuring personalised ads, generating audience insights, and developing and improving products. This includes using first- and third-party cookies, which store or access standard device information such as a unique identifier. If you agree, we’ll also use cookies to complement your shopping experience across the Amazon stores as described in our Cookie Notice. We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements. We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences and to provide our services, as detailed in our Cookie Notice. ![]()
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