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Sony 24 -70mm f/2.8 Carl Zeiss Vario Sonnar T Zoom Lens for Sony Alpha Digital SLR Cameras
- Zoom range of 24-70mm for all-around versatility
- Brilliant large-aperture f2.8 design
- Carl Zeiss® T* coating to minimize lens flare
- Fast, silent auto-focus -- SSM (Super Sonic wave Motor)
- Aspherical lens elements to reduce spherical distortion
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|Aperture Control Design||Aperture controlled by camera|
|Compatible Devices||Alpha & Minolta Digital SLR Series|
|Compatible Lens Hood Part Number||petal shaped hood|
|Compatible Mountings||Sony/Minolta Alpha|
|Included Components||Sony 24 - 70mm f/2.8 Vario-Sonnar Digital SLR|
|Item Dimensions||3.27 x 3.27 x 4.37 inches|
|Item Display Weight||0 pounds|
|Item Weight||2.11 pounds|
|Lens Type||Zoom lens|
|Macro Focus Range||0.34 m|
|Manufacturer Warranty Description||1 year limited|
|Maximum Aperture Range||F2.8|
|Maximum Focal Length||70 mm|
|Maximum Format Size||35mm full frame|
|Minimum Focal Length||24 mm|
|Number of Diaphragm Blades||9|
|Number of Elements||17|
|Number of Groups||13|
|Photo Filter Thread Size||77 mm|
|Shipping Weight||4.4 pounds|
|Style Name||US Version|
From the Manufacturer
Vario-Sonnar T* 24-70mm F2.8 ZA SSM Zoom Lens
Brilliant performance in compact design. This superb Carl Zeiss Vario-Sonnar T* Zoom Lens provides large-aperture f2.8 brilliance, all-purpose 24-70mm zoom range and fast, silent auto-focus with SSM (Super Sonic wave Motor) design - plus aspherical and ED glass elements to reduce distortion for superior clarity and color (35mm equivalent: 36-105mm).
When changing your aperture to defocus the background, the light sources appear blurred. This ‘bokeh’ effect of the blurred background can be enhanced with circular aperture blades used in this lens. Conventional aperture blades have flat sides creating unappealing polygonal shaped defocussed points of light. α lenses overcome this problem through a unique design that keeps the aperture almost perfectly circular from its wide-open setting to when it is closed by 2 stops. Smoother, more natural defocusing can be obtained as a result.
ED (Extra-low Dispersion) glass
As focal lengths get longer, lenses built with conventional optical glass have difficulties with chromatic aberration, and as a result images suffer from lower contrast, lower color quality, and lower resolution. ED glass dramatically reduces chromatic aberration at telephoto ranges, and provides superior contrast across the entire image, even at large aperture settings. Super ED glass provides enhanced compensation for chromatic aberration.
Aspherical lens elements
Aspherical lens design dramatically reduces spherical aberration while also reducing lens size and weight. Spherical aberration is a slight misalignment of the light rays projected on the image plane. This is caused by differences in refraction at different points on conventional spherical lenses which degrade image quality in large-aperture lenses. Specially shaped “aspherical” elements near the diaphragm restore alignment of light rays at the image plane, maintaining high sharpness and contrast even at maximum aperture and can also be used at other points in the optical path to reduce distortion. Well-designed aspherical elements can reduce the total number of elements required in the lens, thus reducing overall size and weight. Advanced Aspherical (AA) elements are an evolved variant, featuring an extremely high thickness ratio between the center and periphery. AA elements are exceedingly difficult to produce, relying on the most advanced molding technology to consistently and precisely achieve the required shape and surface accuracy, resulting in significantly improved image accuracy and quality.
Carl Zeiss T* (T-star) coating
Coated optics were pioneered by Carl Zeiss - and this superb lens features the Carl Zeiss T* (T-Star) coating that virtually eliminates lens flare, internal reflection and light scattering that can otherwise occur at glass-to-air surfaces. The T* coating contributes to outstanding image quality, with high contrast and uniformly excellent resolution right out to the image edges. Not simply applied to any lens - the T* symbol only appears on multi-element lenses in which the required performance has been achieved throughout the entire optical path, therefore guaranteeing the highest quality.
Focus hold button
Once you’ve adjusted focus to where you want it, pressing this button on the lens barrel will keep the lens locked to that focusing distance. The preview function can also be assigned to this button through the camera’s custom settings.
The distance encoder plays an integral part in ADI flash metering, which delivers high precision flash metering that is unaffected by the reflectance of subjects or backgrounds. The distance encoder is a lens component that directly detects the position of the focusing mechanism, and sends a signal to the CPU in order to measure distance to the subject. During flash photography, this data is very useful in calculating how much flash output is appropriate to the scene.
Only the middle groups of the optical system move to achieve focus, so the overall length of the lens does not change. Other important benefits include fast autofocusing and a short minimum focusing distance. Also, the filter thread at the front of the lens does not rotate, which is convenient if you’re using a polarizing filter.
SSM (Super Sonic wave Motor)
SSM is a piezoelectric motor that contributes to smooth and silent AF operation. The motor produces high torque at slow rotation, and provides immediate start and stop responses. It is also extremely quiet, which helps keep autofocusing silent. Lenses that feature SSM also include a position-sensitive detector to directly detect the amount of lens rotation, a factor that improves AF precision overall.
2008 Sony Electronics, Inc.
All rights reserved. Sony, the Sony logo, Alpha, “α” and Super SteadyShot are trademarks of Sony. All other trademarks are trademarks of their respective owners.
Style: US Version
Top Customer Reviews
The lens build and mechanical quality are top of the line. It focuses quietly and very fast thanks to the SSM (Super Sonic Wave Motor). Also the focus zoom ring is nicely sized and operate smoothly.
The Carl Zeiss 24-70mm f/2.8 is very shapr for zoom lens. It is sharp in the center at f/2.8 at all focal lengths, and the excellent contrast and saturation are what strike me the most in real life applications.
Now on the negatives. The biggest downside of 24-70mm F2.8 is it's size and weight. This lens is not small or light enough for a walkaround lens(due to solid build heavy body), and I find holding this lens can be tiring for half day shooting.
All in all, it is one the best Sony/Carl Zeiss all purpose lens made. The box contains a Carl Zeiss 24-70mm F2.8 SSM lens, front and rear lens cap, a metal petal lens hood, and a leather lens carrying case.
Sony and Zeiss have a very useful partnership going, which I hope will result in a greater variety of lenses in the future. Recently, Sony and Zeiss have introduced a Sony SAL1635Z 16-35mm f/2.8 ZA Lens that improves upon the rare and coveted Minolta 17-35mm f3.5 G lens.
Two minor complaints about this lens are the following. First, like the other Sony/Zeiss lenses, it is rather heavy, but I suppose that good glass is heavy. Second, it zooms by elongating externally unlike the Minolta 28-70mm f/2.8 G lens.Read more ›
I've owned this lens now for about four months and I have only one bad thing to say. For most of you, this will be meaningless, but for those shooters who use full-frame format cameras, you should know this lens will vignette at the corners with a filter attached.
If you use a UV/Haze filter for "protection," you may notice some small vignette at the corners at 24mm. I never have a filter attached unless it's a polarizer and since a UV filter is thinner than the rotating ring of a CPL filter, the UV ring may not intrude upon the image. If you stack a CPL onto the UV filter, I would say you will have a great deal of vignette at 24mm and maybe some around 30mm.
Other than that, the lens is amazing. Super sharp all the way to the corners and the focus is very, very fast and accurate. I used this lens for a time on a Konica Minolta 7D (6 megapixels) and it was great, but when I finally upgraded to a Sony a900 I was treated to a feast of sharpness and clarity.
Sure, it's big and it's heavy. And expensive. These are small penalties for what you get in return. If you want better image quality, you'd have to carry three or four prime lenses with a net weight gain in your camera bag.
Oh, one other thing: The zoom ring rubber grip is very pretty, but the knurling is so fine that it's hard to feel exactly where you are grabbing the lens. I prefer the old Minolta grips with the deep grooves that were also angled relative to the lens barrel because they were so easy to feel with your fingertips.
It's the perfect lens to compliment Sony's new 24.6mp flagship camera the a900 Sony Alpha A900 24.6MP Digital SLR Camera (Black), but a700 users will appreciate this lens as well. It joins Sony's Zeiss 85/1.4 Sony SAL-85F14Z 85mm f1.4 Carl Zeiss Planar T Coated Telephoto Lens for Sony Alpha Digital SLR Camera and Zeiss 135/1.8 Sony SAL-135F18Z 135mm f/1.8 Carl Zeiss Sonnar T Telephoto Lens for Sony Alpha Digital SLR Camera lenses in an growing line-up of amazing flagship lenses.
Most Recent Customer Reviews
A versatile lens with great glass. I use this lens for everything from portraits to landscapes and have no complaints about its performance. Only praise. Read morePublished 5 months ago by Robert Moran
Awesome lens. Very fast for indoor and outdoor shooting. Worth every penny.Published 9 months ago by P. Cox
Now, if I could only get a Sony 70-400 Zeiss zoom for less than the cost of my house, I think I'd have this camera covered with all the glass it would ever need.Published 13 months ago by GARY SMITH
Very sharp and fast lens. Only issue is the bokeh quality; it is not the best, but not bad enough to turn away from this lens. Read morePublished 15 months ago by J Benjamin
One of the best lenses by any manufacturer. On my a99 it;s perfect.Published 17 months ago by CaptainChet