Sigma 35mm F1.4 DG HSM Art Lens for Pentax K

Sigma 35mm F1.4 Art Lens: Precision and Brilliance for Pentax K-Mount

Overview:

The Sigma 35mm F1.4 DG HSM Art Lens stands out as an exceptional choice for Pentax K-mount camera users seeking a high-quality prime lens. Renowned for its fast f/1.4 aperture, this lens excels in low-light conditions and effortlessly achieves a shallow depth of field, making it ideal for creating striking portraits with smooth bokeh effects. Its optical prowess is further enhanced by an advanced design featuring 13 elements in 11 groups, including 1 FLD and 4 SLD elements, and 2 aspherical elements, all coated with Sigma's Super Multi-Layer Coating to reduce flare and ghosting. The lens's Hyper Sonic Motor (HSM) ensures rapid and silent autofocus, while the manual focus override offers additional control. Its robust build quality and weather-sealing promise durability and reliability in various shooting environments. With a rounded 9-blade diaphragm, the lens promises aesthetically pleasing bokeh, adding to its versatility. However, its considerable size and weight, along with a higher price point, are factors to consider. Overall, the Sigma 35mm F1.4 DG HSM Art Lens is a top-tier choice for photographers prioritizing sharpness, build quality, and artistic control in their imagery.

More Details:

• Fast f/1.4 Aperture: Ideal for low-light conditions and achieving a shallow depth of field.
• Exceptional Sharpness: Delivers crisp, clear images even at the widest aperture settings.
• Robust Build Quality: Well-constructed and weather-sealed for durability in various environments.
• Hyper Sonic Motor (HSM): Ensures quick, quiet autofocus, perfect for both stills and video.
• Smooth Bokeh: Rounded 9-blade diaphragm creates aesthetically pleasing out-of-focus areas.
• Advanced Optical Design: Includes 13 elements in 11 groups with 1 FLD element, 4 SLD elements, and 2 aspherical elements.
• Super Multi-Layer Coating: Reduces flare and ghosting for higher image clarity.
• Floating Elements System: Enhances performance at close focusing distances.
• Manual Focus Override: Offers additional control for precision focusing.
• Compatibility with Sigma USB Dock: Allows for firmware updates and focus adjustments.

• 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. And optimized power distribution helps correct various types of optical aberration. These features give this F1.4 large-aperture lens truly optimal image quality.
• Exclusive low-dispersion glass - Most chromatic aberration can be removed by combining a high-refractivity convex lens element with a low-refractivity concave element. Yet residual chromatic aberration known as “secondary spectrum” may still remain. To minimize this secondary spectrum, which can be a serious issue with conventional lenses, SIGMA lenses feature up to three types of exclusive low-dispersion glass offering superior performance: ELD (Extraordinary Low Dispersion), SLD (Special Low Dispersion) and FLD (“F” Low Dispersion). In particular, FLD glass offers ultra-low dispersion in combination with high transmittance and the anomalous dispersion characteristics of fluorite. 
• Rounded diaphragm - When photographing with point light sources such as electric lights or reflections on a body of water in the background, the rounded 9-blade diaphragm helps produce an attractive bokeh effect—even at large-aperture settings.
• HSM (Hypersonic motor) - Delivers high AF speed and extremely quiet performance.
• Floating system - This system adjusts the distance between lens groups during focusing, thereby reducing the amount of lens movement required. The result is less aberration at different shooting distances. Benefits are particularly great in macro lenses because they cover a wide range of shooting distances, and in wide-angle lenses, which employ asymmetric configurations of lens elements.
• TSC (Thermally Stable Composite) - A first for the industry, the barrel of the lens features a new TSC (Thermally Stable Composite) that offers minimal thermal shrinkage combined with exceptional hardness. It also offers 25% greater elasticity than polycarbonate. Since its thermal shrinkage is low, TSC matches well with metal parts, further contributing to the high-precision construction of the lens. TSC also makes possible slimmer forms for parts like zoom rings and scaling rings.
• Flare and ghosting reduction - SIGMA’s Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high-contrast images even in backlit conditions. The included lens hood can be attached to block out extraneous light, which can have a negative effect on rendering performance.
• High-precision, rugged brass bayonet mount - The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens.

• Sigma 35mm F1.4 DG HSM Art Lens for Pentax K
• Sigma Lens Cap
• Sigma Rear Lens Cap
• Sigma Lens Hood
• Sigma Soft Padded Lens Case
• Limited 1-Year Warranty
• Limited 3-Year U.S.A. Warranty Extension

Frequently Asked Questions about the Sigma 35mm F1.4 DG HSM Art Lens

Is the Sigma 35mm F1.4 DG HSM Art Lens compatible with all Pentax K-mount cameras?

Yes, this lens is designed to be fully compatible with Pentax K-mount full-frame cameras.

What makes the f/1.4 aperture of this lens beneficial?

The fast f/1.4 aperture allows for excellent performance in low-light conditions and creates a shallow depth of field for stunning bokeh effects.

How does the Hyper Sonic Motor (HSM) enhance the lens's performance?

The HSM provides fast and silent autofocus, making it suitable for both photography and videography.

Can I manually adjust focus while using autofocus?

Yes, the lens features a manual focus override, allowing you to make precise adjustments even when the autofocus is engaged.

Is this lens suitable for portrait photography?

Absolutely, its shallow depth of field and excellent sharpness make it ideal for portrait photography.

How does the lens perform in terms of build quality and durability?

The lens boasts a robust build quality and is weather-sealed, offering durability and reliability in various shooting conditions.

Is the lens heavy or bulky?

While offering high-quality optics, the lens is relatively large and heavy, which might be a consideration for some photographers.

Does the lens support firmware updates?

Yes, it is compatible with the Sigma USB Dock, which allows for firmware updates and focus calibration.