Further readings for the Sony FE 70-200mm F2.8 GM OSS
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As the only lens reaching 400mm currently in the lineup, the Sony FE 100-400mm F4.5-5.6 GM OSS is an important addition for Sony full-frame E-mount cameras such as the action-oriented A9 and some A7 variants. It will also appeal to owners of such cropped-sensor APS-C models as the A6000, on which it offers nearly the equivalent field of view of a 200-600mm lens.
Announced in February 2016, the $2598 Sony FE 70-200mm f/2.8 GM OSS (Sony FE 70-200mm f/2.8) is a short-to-mid telephoto zoom lens for such Sony full-frame a7 series cameras as the a7R II. The “GM” in the full lens name signifies that the Sony FE 70-200mm f/2.8 belongs to Sony’s “G Master” lineup of pro-grade optics.
For photographers working in fast-paced environments or after the convenience of a multi-purpose optic, zoom lenses are often a versatile option. Image quality on zooms has improved across many lenses, too, which in some cases come close to rivalling the performance of a prime.
Sony FE 70-200mm F2.8 GM OSS mounted on Sony A7R II with Sony FE 2.0x Teleconverter
Will you have any tests of this lens with the FE 2.0 teleconverter? Wondering how sharp it will be at the 200mm end on the A7RII or A9 compared to the Sony FE 100-400mm f/4.5-5.6 GM OSS Lens at 400mm. I like the idea of having the option of having a 2.8 200mm option for low light situations but not sure how much sharpness and auto focus speed will be lost. I was told by a local sony rep that the new stacked CMOS sensor technology in the A9 may improve the next high resolution camera body's autofocus system technology (possibly A7RIII) which may make the use of the 2.0 teleconverter faster as well. What are your thoughts on this? Thank you!
There may be a serious problem with the selection of the copy of each lens used for the testing, and a part of that problem is the difference in quality of individual copies, and unfortunately it can be either bad or good. I bought a poor copy of one Sony lens, and it happens that DXO had evidently gotten a poor copy of the lens also. From a different dealer I heard that many of their customers had very good results from the lens, so I sent mine to Sony. They treated my case as a warranty claim, adjusted the lens to design spects,returned it and it was night and day better than it had been. So whereas I had put it on the back shelf, now I am using it constantly. My point is, I think it is better to have the manufacturer provide a copy of the lens for testing, so that DXO knows that the lens as tested meets design specs. Given the way the supply chains work, there are unfortunately, going to be copies that don't in fact meet design specs that get into the marketplace, and maybe more than ought to. The fix for a poor copy is getting the manufacturer to repair or replace it and my experience tells me they will. But what DXO needs to do is test the lenses as designed to give us a reliable estimate of how good or bad they are when they meet specs. Important to realize that a test of a poor copy can mean a photographer doesn't buy a lens that would be perfect for him. There's no fix for that.
I'd much rather have tests of random lenses purchased from different vendors.
That gives an idea of range of quality to be expected and process consistency.
Having a factory selected and tuned "ringer" lens submitted for test is intellectually dishonest. It does not accurately reflect what a consumer will be buying. How many consumers have the equipment and experience to test their own lenses, and how many return them for "tweaking"?
May as well say, "all Sony lenses should be returned for optimization after purchase", to equal a selected ringer submitted for testing.
There are reported problems with this lens, possibly due to decentered elements, of some areas being extremely sharp, and some areas soft. Images of test targets at varying focal lengths and apertures should be presented, so users know what to benchmark their lenses against.
Is DXO planning to test the current Nikon 70-200mm f/2.8E FL ED AF-S VR?
Also how many copies of this Sony lens were tested? Lensrentals ran tests on multiple copies of this lens and found them all inferior to both the current FL Nikon and the older Canon. There were concerns on early lot problems from Sony, was this purchased or a specific sample provided by Sony? Sample test images would also be helpful to illustrate lens performance (or lack thereof).
Everybody knows that DxO testing methodology is a trade secret, but I know for sure at the end of each test they multiply the results by a randomly generated number. The number can be higher or lower, depends on $ amount provided from a sponsor ;)