![]() ![]() ![]() There are no Pentax dealers or service in my country. I'll see with the seller if it would be possible to return the camera in case of problems. But on the K3-II it misses a lot and enough to ruin the image, no matter if the subject is still, moving, under good light, etc. This video is either unavailable or not supported in this browser Error. I've been using the K5-II with the 18-35 without any issues and the AF is working perfectly for my kind of use. Hands-On Review: the Sigma 18-35mm f/1.8 Lens Read More This is a modal window. Much depends on how good you are with the camera.Hi Gatorguy, Not like most or even many, but more than you might be accustomed to. You just have to be willing to accept a slightly lower hit count for those fast-moving musicians 'cause there's probably going to be some misfocused. I've used it under a variety of scenarios from architecture to stage events. I have the lens (and the camera) and like it. Sometimes it just needs another tap on the focus to lock it in. If it's for low-light interiors, not much action/movement, I think you would be fine. All existing evidence points to it being a rarity, no more prevalent than other causes of failure across camera brands.Īs for the Sigma lens it may come down to what your intended use is. Compatible with Sigma's USB Dock and Sigma Optimization Pro software for fine-tuning your lens' performance, updating its firmware, and better suiting it to your needs.I would not worry about a K-70 and aperture failure for even a moment.An internal focusing and zooming mechanism helps to maintain a consistent overall lens length and a non-rotating front ring facilitates more efficient use of circular polarizers.Constructed using a TSC compound material, this lens is lightweight while also exhibiting notable durability and resistance to environmental changes.This AF motor can also be manually overridden at any time by rotating the focusing ring, giving you the ability to fine-tune image sharpness through manual focusing. Hyper Sonic AF Motor The Hyper Sonic Motor provides fast, quiet, and smooth auto focusing that is well-suited for use with video applications. A Super Multi-Layer Coating also benefits the image quality by reducing reflections and flare and contributing to greater overall contrast and fidelity. ![]() Optimized Lens Design Four aspherical lens elements, as well as the incorporation of five SLD glass elements, help to minimize the appearance of distortions and aberrations throughout the zoom range and provide clear imagery with enhanced sharpness. The range of focal lengths it covers, from wide-angle to normal-length, is nicely situated for everyday and artistic shooting applications. Art Lens Line This lens is part of Sigma's Art line deeming it well-suited to creative image making due to its large, constant f/1.8 maximum aperture and ability to produce aesthetic bokeh by way of a nine-blade circular diaphragm. The dock allows you to specify certain parameters and other settings through the Sigma Optimization Pro software, such as AF speed and focusing limitations. For control of focus, a Hyper Sonic Motor (HSM) is used to ensure fast, precise, and quiet focusing capabilities that are well suited to continuous shooting and movie recording.įor updating lens firmware and fine-tuning its nuances to best suit your personal shooting, this lens is compatible with the Sigma USB Dock. The lens has a focal range equivalent to 27mm - 52. It is a wide aperture, standard zoom-lens for digital single lens reflex cameras with APS-C size sensors. An internal focusing and zooming mechanism also helps to maintain a compact and consistent overall length and non-rotating front ring also better enables the use of circular polarizing filters. Lens Description: The Sigma 18-35mm f/1.8 DC HSM is the first zoom lens ever to achieve a maximum aperture of f/1.8 throughout the zoom range. The lens barrel design is constructed from a Thermally Stable Composite (TSC) material that is akin to metal in texture and resistance to temperature and environmental changes while also remaining lightweight and compact. A Super Multi-Layer Coating has also been applied to lens elements to reduce surface reflections, lens flare, and ghosting to produce images with higher contrast and color fidelity. The lens integrates four aspherical elements into its construction as well as five Special Low Dispersion (SLD) glass elements to help minimize various aberrations and distortions throughout the zoom range as well as provide greater image sharpness and clarity. It is specifically designed for use with APS-C-sized sensors and provides a 35mm-equivalent focal length range of 27-52.5mm. The Sigma 18-35mm f/1.8 DC HSM Lens for Pentax is a wide-angle to normal-length zoom lens that features a fast, bright constant f/1.8 maximum aperture. Sigma 18-35mm f/1.8 ART DC HSM Lens for Pentax (Sigma Malaysia) ![]()
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