Lentila Sigma 24-105mm f/4 DG OS

Update 17 decembrie
In ultima vreme Sigma 24-105mm F4 DG OS HSM a reusit sa faca impresii mai mult decat pozitive, in unele review-uri fiind cotata peste lentila L similara de la Canon.

• http://www.dxomark.com/en/Reviews/Sigma-24-105mm-F4-DG-OS-HSM-A-Canon-mount-lens-review-A-new-standard
•  http://www.the-digital-picture.com/Reviews/Sigma-24-105mm-f-4.0-DG-OS-HSM-Art-Lens.aspx
•  http://www.canonrumors.com/2014/02/review-sigma-24-105mm-f4-dg-os/

DXOMark
“Given its popularity, Canon has been slow to replace the EF24-105mm f4L IS USM, and it has provided rival Sigma with the opportunity to gain some leverage in this highly competitive sector. Sigma are sure to be rewarded as it’s not only a superb performer optically, at $899 it comfortably undercuts the Canon and is well worth taking a closer look.”

CanonRumors
“My opening line said it all: Sigma is absolutely killing it with these new lenses. They perform, look and are priced better than the Canon equivalents. …….. Their attention to industrial design and optics makes me think more of the even higher-end Zeiss lenses than it does a Canon, which is smart, because the cost difference between a Zeiss lens and Sigma is even greater, creating an even more compelling price gap in Sigma’s favour.”

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Articol initial - 1 noiembrie 2013
Sigma a anuntat oficial lentila 24-105mm f/4 DG OS din seria Art pentru aparatele cu senzor full-frame si crop. Diametrul filtrului este de 82 mm.
Fata de lentila similara Canon este ceva mai grea - 885 de grame.
Pretul lentilei este de 899$

Alte specificatii tehnice:

• elemente diafragma - 9
• diafragma minima F/22
• distanta minima de focus - 45cm / 17,7 in
• constructie - 19 elemente in 14 grupuri

Tinand cont de ultimele lentile realizate de Sigma ma astept ca si aceasta sa se comporte cel putin la acelasi nivel cu similarele Canon si Nikon.

Cateva imagini realizate cu aceasta lentila: http://www.lenstip.com/2065-news-Sigma_A_24-105_mm_f_4_DG_OS_HSM_-_sample_images.html

Mesaj oficial Sigma (engleza)
Access the full power of your camera’s image sensor. This new zoom fulfills Sigma’s uncompromising pursuit of high resolution.

 

Specs - Click for larger

The image sensors of digital SLR cameras continue to offer higher and higher resolution, and photographers are looking for high-performance lenses that leverage these sensors’ full power. In the case of zoom lenses as well, which are a dependable go-to in a wide variety of photographic conditions, photographers want convenience combined with exceptional optical performance. The new SIGMA 24-105mm F4 DG OS HSM zoom lens more than fulfills these requirements, offering exceptionally stable high resolution from wide-angle to medium telephoto photography.
While featuring a large-aperture 82mm filter size, this lens minimizes optical aberrations and avoids reduced peripheral brightness, an issue that tends to affect lenses with similar specifications. Each lens is checked with Sigma’s proprietary A1 MTF (modulation transfer function) measuring system to ensure it offers exceptional quality for the high-megapixel era. Try this new high-performance zoom for yourself, and experience Sigma’s uncompromising pursuit of high resolution.
The full realization of the Art product concept for you to hold in your own hands and appreciate with your own eyes.

 

MTF – Click for Larger

Designed with a focus on sophisticated optical performance and tremendous expressive power, our new Art line of lenses delivers top-level image quality. With unsurpassed expressive performance, these lenses reach the high standards demanded by photographers with an artistic, creative inclination. Along with landscapes, portraits, still-life, close-up and casual snaps, they’re perfect for the kind of photography that unleashes the inner artist. Ideal for studio photography, they offer just as much expressive scope when capturing architecture, starry skies, underwater shots and many other scenes. Hold it in your own hands and appreciate it with your own eyes.