SIGMA 18-300mm F3.5-6.3 DC MACRO HSM [C] F/PENTAX

SIGMA 18-300mm F3.5-6.3 DC MACRO HSM [C] F/PENTAX

Μάρκα: SIGMA
Προιόν: SIGMA 18-300mm F3.5-6.3 DC MACRO OS HSM
Διαθεσιμότητα: 1 έως 6 ημέρες
Τιμή: 511,00€

Κατασκευή φακού

 

 
  • FLD γυαλί
  • SLD γυαλί
  • Ασφαιρικά φακός

Προδιαγραφές

 

 
Κατασκευή φακού 17 στοιχεία σε 13 ομάδες
Ελάχιστο διάφραγμα (W) F22
Μέγεθος φίλτρου 72㎜
Οπτική γωνία (ισοδύναμο με 35mm) 76,5 ° C - 5,4 °
Ελάχιστη απόσταση εστίασης 39 εκατοστά / 15.4in.
Διαστάσεις (Διάμετρος x Μήκος) Φ79mm × 101,5 χιλιοστά / 3.1in. × 4.0in.
Αριθμός λεπίδων διαφράγματος 7 (στρογγυλεμένες διαφράγματος)
Μέγιστη αναλογία μεγέθυνσης 1: 3
Βάρος 585g / 20,6 ουγκιά

Η εμφάνιση και οι προδιαγραφές ενδέχεται να αλλάξουν χωρίς προειδοποίηση.

Emphasizing image quality. This is a SIGMA's new all-in-one lens.

16.6x High Ratio Zoom Lens, incorporating 4 FLD glass elements to prioritize the optical performance

 

A high ratio zoom lens often requires compactness and enhancement of additional features, to be capable enough to cover various shooting scenes with convenience and versatility. Even with a high ratio zoom lens, our goal is to satisfy enthusiastic photographers with the versatility of the lens and its optical performance. Therefore, we sought for the point where all the pieces, such as specification, performance and size, fall into place, and this lens is the fruit of this journey. Enjoy the performance of a high ratio standard zoom lens that has "the highest standard for excellent image quality based on each concept", of which product lines SIGMA has renewed and established with SIGMA Global Vision.

[Contemporary]
Latest technology for high optical performance and compactness High performance line corresponding with various photography situations
 

SIGMA is organizing all its interchangeable lenses into three product lines; Contemporary, Art and Sports. Among the three, the Contemporary line is a high performance line which incorporates the very latest technology making it possible to accommodate both high optical performance and compactness for use in various photography situations. SIGMA has solved the difficult problem of keeping the size and weight down without compromising optical performance and function with the latest technology.

 
 
 
Excellent optical performance that satisfies experienced users
 

This lens incorporates 4 FLD (“F” Low Dispersion) glass elements, which have performance equal to fluorite plus 1 SLD (Special Low Dispersion) glass element. It enables this lens to minimize the chromatic aberration, especially toward the telephoto end, and provide clear image quality with high color fidelity.

*FLD glass is the highest level low dispersion glass available with extremely high light transmission. This optical glass has a performance equal to fluorite glass which has a low refractive index and low dispersion compared to current optical glass. It also benefits from high anomalous dispersion. These characteristics give excellent correction for residual chromatic aberration (secondary spectrum) which cannot be corrected by ordinary optical glass and ensures high definition and high contrast images.

Lens specifications

 
 
 
 
 
 
 
Accumulated lens technology leads to superior image quality
 

The most appropriate optical glass elements are selected to optimize all focal lengths of the lens. From wide angle to telephoto and macro, it offers superior image quality throughout the entire zoom range. It compensate for the distortion very well, especially at wide-end, and carries extraordinary expressive capability from the center to the corners.

 
 
Lens Construction
 

Aspherical lens FLD glass SLD glass

 
 
 
Flare and ghosting reduction
 

From an early stage in the lens design process, flare and ghosting have been measured to establish an optical design resistant to strong incident light sources such as backlighting. SIGMA's Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high contrast images even in backlit conditions.

Exclusive low-dispersion glass
 

The degree to which light is refracted by glass depends on the light's wavelength. This fact causes different colors of light to focus at slightly different points. The result is chromatic aberration, the color fringing that is particularly noticeable in telephoto lenses. 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. Meticulous deployment of these types of exclusive low-dispersion glass and optimization of power distribution gives SIGMA lenses superlative image rendition undiminished by residual chromatic aberration.

SIGMA lens technology