122 Sigma 1835mm F18 Dc Hsm Art Lens for Nikon F
What makes a standard lens platonic for y'all? Certain of import qualities are required, such as fast maximum aperture, versatility for snap shots, portraiture and indoor photography plus a proficient combination of a wide range of focal lengths in a compact design. SIGMA eighteen-35mm F1.8 DC HSM is the first zoom lens ever to achieve a maximum aperture of f1.viii throughout the zoom range. It is a wide aperture, standard zoom-lens for digital single lens reflex cameras with APS-C size sensors.*1 The lens has a focal range equivalent to 27mm - 52.5mm in a 35mm format and information technology tin cover the angles of view of multiple stock-still focal length lenses. This wide discontinuity, standard zoom lens enables the photographer to expand creative possibilities on whatever occasion.
*1 Every bit of April, 2013.
* Angle of view differs on cameras to which the lens is attached.
Our Art line delivers high-level creative quality
Sigma is organizing all its interchangeable lenses into three product lines; Contemporary, Fine art and Sports. Designed with a focus on sophisticated optical performance and arable expressive power, our Art line delivers high-level artistic expression. Developed with the maximum emphasis on creative touch on, they are designed to meet the expectations of users who value a artistic, dramatic event above firmness and multifunction. Along with landscapes, portraits, even so-life, close-up and casual snaps, they are perfect for the kind of photography that unleashes the inner creative person. Ideal for studio photography, they offer just equally much expressive telescopic when capturing compages, starry skies, underwater shots and many other scenes.
Excellent Usability
A zoom lens is very convenient as it offers various angles of view merely by rotating the zoom band. Even so, the downwards side was that no zoom lens ever offered a faster aperture than f2.8 which led photographers to select fixed focal length lenses for brighter images. While the discontinuity value of prime number lenses is superior to zoom lenses, their field of view is always the aforementioned, and therefore it was ever necessary to bear many stock-still focal length lenses. SIGMA 18-35mm F1.8 DC HSM is a new generation lens that tin can evangelize images at f1.8 discontinuity throughout its focal length. The brilliant viewfinder is very helpful for checking the focus and composition of the image. If it is compared with a lens of F2.viii, the faster shutter speed and the shallow depth of field of F1.8 further expands creativity. From broad to standard range this lens offers the excellent versatility and operation of multiple fixed focal length lenses.
Designed to minimize flare and ghosting
Flare and ghosting were thoroughly measured and monitored from an early stage in the lenses development to establish an optical design which is resistant to stiff incidental light such equally backlight. The Super Multi-Layer Blanket reduces flare and ghosting and provides sharp and high dissimilarity images even in backlit conditions. Attaching the matched petal blazon hood, which is supplied, will provide actress protection from flare and ghosting.
Fruit of cutting border engineering science
To attain a wide zoom lens with a maximum aperture of f1.8, various technical bug need to exist overcome. As the discontinuity value gets larger, the depth of focus becomes shallower, thus it makes the lens pattern extremely complicated in society to compensate for diverse distortions, such as spherical, axial chromatic and astigmatic aberration along with curvature of field. In order to compensate for astigmatic aberration beyond the entire focal range, nosotros accept relied on the feel and know how gained when designing our super wide angle zoom lenses such as SIGMA12-24mm F4.five-5.half dozen 2 DG HSM and SIGMA viii-16mm F4.5-5.6 DC HSM. In addition, the technological innovation at our Aizu factory also contributes to better lens product. Information technology has enabled united states to develop a wide drinking glass-molded aspheric lens, and the incorporation of SLD (Special Low Dispersion) glass has optimized power distribution of the optical elements and compensated for various aberrations as well as curvature of field at the widest angle. Thanks to our noesis of lens design accumulated over a long period of time plus the latest lens manufacturing techniques, SIGMA has finally made the dream of a zoom lens with F1.8 throughout its entire focal range come true.
Design concept
The new product lines contain rubber for the zipper part of the provided lens hood. For better usability, the designs of the lens cap and AF/MF changeover switch have been improved. In order to ensure high accuracy of the product, all metallic parts and the new chemical compound cloth, TSC (Thermally Stable Blended), which has a high analogousness to metallic parts, are housed internally. On the lens butt, the final three digits of its release year are engraved so the lens can be identified according to the year of its launch.
Newly developed "USB DOCK" exclusively for new production lines
Based on these new lines, nosotros have developed special software (SIGMA Optimization Pro) that can update the lens firmware and suit parameters such equally focus.
Convenient treatment
Convenient treatment is accomplished by incorporating internal focusing and zooming which prevents whatever alter in the length of the lens when focusing and zooming. It is possible to use a specialist filter, such as a Circular Polarizer, as the front office of the lens does non rotate.
Minimum focusing distance of 28cm
With a minimum focusing distance of 28cm and a maximum magnification ratio of one:4.3, this lens is excellent for close-upward photography.
Hyper Sonic Motor
The HSM (Hyper Sonic Motor) ensures a silent, high-speed AF part. Optimizing AF algorithm, smoother AF is achieved. It too enables full-time manual focusing capability which allows sensible focus adjustment by simply rotating the focus ring.
Incorporating Rounded diaphragm
The ix bract rounded diaphragm creates an attractive round bokeh at large-aperture settings.
Brass made bayonet mountain
This lens incorporates a brass fabricated bayonet mountain which has both high accuracy and immovability. A special treatment to reinforce its strength is practical to the surface giving it greater strength and making it highly resistant to long-term use.
Evaluation with Sigma's own MTF measuring system "A1"
We used to measure lens performance with MTF measuring system using conventional sensors. Withal, we've now adult our own proprietary MTF (modulation transfer function) measuring system (A1) using 46-megapixel Foveon direct image sensors. Even previously undetectable loftier-frequency details are at present within the telescopic of our quality control inspections. The SIGMA 18-35mm F1.8 DC HSM will all exist checked using this "A1" earlier they are shipped.
"Made in Japan"
Optimizing quality with our integrated production arrangement, Sigma is focused on making things right, with our own easily and our own techniques. We are now i of the very few manufacturers whose products are solely "made in Japan." Nosotros like to think our products are somehow imbued with the essence of our homeland, blessed as it is with make clean air and h2o, and focused, hard-working people. We pride ourselves on the accurate quality of Sigma products, born of a wedlock betwixt highly attuned expertise and intelligent, advanced engineering. Our sophisticated products accept satisfied professionals and lovers of photography all over the earth, considering our manufacturing is based on genuine adroitness, underpinned by the passion and pride of our experts.
| Lens Construction | 17 elements in 12 groups |
|---|---|
| Angle of View (for SD1) | 76.5 - 44.2 degrees |
| Number of Diaphragm Blades | ix Blades (Rounded diaphragm) |
| Minimum Aperture | F16 |
| Minimum Focusing Distance | 28cm / 11.0in. |
| Maximum Magnification | ane:4.3 |
| Filter Size | Diameter 72mm |
| Dimensions | Diameter 78mm ten 121.0mm / 3.1in. x 4.8in. |
| Weight | 810g / 28.6oz. |
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Source: https://connscameras.ie/camera-lenses/sigma-18-35mm-f18-dc-hsm-lens-for-canon-ef/085126210540/26697/
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