Question 1

I have a a7r. should i spend the extra $$ and get a sel2470z instead?

Accepted Answer

I have had both lenses and the 24-70 ZA is the best choice. Color is a lot sweeter and the sharpness is substantially better considering the A7r is made for resolution quality is the best Ive seen. The Zeiss lens has gone down in price and if you need a zoom its worth paying the extra money. I think bad reviews for the Zeiss 24-70 are based on other bad reviews and not on the actual experience and longer time shooting with it. If you want a sharper lens get a prime. Otherwise don't go by reviews and rent the lens and shoot the hell out of the lens and have a true opinion. I happen to shoot several thousand exposures on min and can only blame myself for bad shot, not the lens. The new 28 lens is a great lens for the price and better than most zooms out there if you just want an all round prime you can crop to your heart's delight with all those A7r pixels.

Question 2

has anyone used this lens on a a5100? reacently saw someone selling on CL for 180 bucks.  is it worth it?

Accepted Answer

I used this lens on an A6000 camera.  It is a small, light weight lens and physically works well on the A5000-A6000 series.  If you mostly care about sharpness at the center of the image, this lens is fine; however the edges of the image are soft at all apertures. I ended up selling the FE 28-70mm lens and buying the E 18-105mm lens, which is bigger and heavier but also optically better.

Question 3

What is the difference, (other than $165), between this lens and the exact same thing listed just below it??

Accepted Answer

I can't see what you're looking at so I can only guess.  One is if it new or used I would go with used just like I did with this lens.  It works great and lenses tend to last forever if their treated right. Not like a camera that has a click count with sensors that could go bad.  The other thing I could guess you mean is the difference between the Zeiss 24-70 and this Sony 28-70.the Zeiss a better lens with better coating, a constant aperture,  and slightly wider field of view.  But if you're buying it for the a7s where a constant aperture isn't as important you may not notice a difference.   Hope this helps

Question 4

Will this lens fit on a Sony a6000?

Accepted Answer

yes it is an excellent lens on the a6000, I keep one on my a6000 about 90% of the time because the combination provides a very practical zoom range and very fast & accurate autofocusing. The lens is lightweight & compact (for a full frame lens) comfortable to use and looks great. As others point out the resulting field of view is like a 42-105mm lens would be on a full frame camera (such as the A7). In case you're interested, the a6000 smaller sensor 'sees' only about 45% (less than half) of the light from this lens that a full frame sensor would see, that 45% all being centered in the glass, while the rest of the light (about 55%) misses the a6000 sensor and is wasted (absorbed or reflected by other internal surfaces). But that centered portion of the FE lens which the a6000 sensor utilizes typically provides much better image quality than areas further out (closer to the outer edge). In other words the a6000 uses a 'sweeter' area of a full frame lens than a full frame camera does. So using the bigger FE-series lens on the a6000 (instead of just a E series lens) is not a waste of money and is worth the other tradeoffs (wasted light & reduced field of view).  The a6000 camera records extremely high detail images (like 54MP in a full frame camera would!) but that same high resolving power that can capture amazing or beautiful details also captures great details that reveal distortion caused by even minor lens imperfections.

Maximum Aperture	5.6 f
Minimum Aperture	22
Image stabilization	Optical
Compatible Camera Models	Sony A7R, Sony ZV-E1, Sony Alpha QX1, Sony A7S, Sony NEX-5R, Sony NEX-5T, Sony A7S II, Sony A6500, Sony A6400, Sony A6300, Sony A6100, Sony A6000, Sony FX30, Sony A7R IV, Sony A6700, Sony A6600, Sony A7R V, Sony NEX-7, Sony A9, Sony A7 III, Sony NEX-5, Sony A7 II, Sony A7 IV, Sony Alpha NEX-C3, Sony ZV-E10, Sony A7R II, Sony A5100, Sony A7S III, Sony A3000, Sony NEX-5N, Sony A5000, Sony A7C, Sony A9 II, Sony NEX-3, Sony A7, Sony A7R III, Sony A1
Lens Mount	Sony E
Number of Diaphragm Blades	7
Minimum Focal Length	28 Millimeters
Lens Design	Zoom
Lens Fixed Focal Length	70 Millimeters
Focal Length Description	28-70 millimeters
Lens	Standard
Compatible Camera Mount	Sony E
Maximum Focal Length	70 Millimeters

Sony SEL2870 FE 28-70mm F3.5-5.6 OSS Interchangeable Lens for Sony Alpha Cameras (Black)

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