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It's all a matter of specifying what the spec is, and what the acceptable variation limits are. Most consumer goods have wide variation tolerances so you have to analyze the performance of a specific lens with your personal tolerance for quality in mind. For those who are more demanding, this is going to result in more exchanges looking for a good example.There is certainly variation in the manufacturing process. There are a lot of variables. In my day gig, I run sales/mktg. for a company that designs and manufactures pro-audio gear. Our customers can be pretty tweaky when it comes to performance expectations, which they should be. If we had to ship 3, 6, 12, etc. samples of a product until one was deemed 'right', we'd be looking for a new line of work.
It sometimes feels like the products we use to make pictures are more prone to sample variations than other stuff. Could be that we, as customers, expect too much, or that consistent adherence to a product spec. can't be met in the manufacturing process, or folks in final QC are maybe letting things slide, etc. I, for one, don't really enjoy the multiple versions of 'buy it, test it, send it back and try again'. Just kinda stinky, that's all.
After, these many tests, is anyone else ready to step forward and admit that, just maybe the Kit lens is really good enough, and that the 24-70mm is not worth 4x the price?
I shot both. The 24-70 is better IME. On some shots it compares favorably with the 55/1.8. And it isn't 4x the price - if you buy separately (which you have to do with an A7r) it is $500 vs. $1200. However the kit lens is respectable, and only the individual can decide if the extra $$$ is worth it. To me it is, if nothing else for the better feel (build quality) and it being faster at the long end. Ymmv.After, these many tests, is anyone else ready to step forward and admit that, just maybe the Kit lens is really good enough, and that the 24-70mm is not worth 4x the price?
Well, I suspect that the experience of the users suggests that there is a continuum, with a bad 28-70 at one end and a good 24-70 at the other.After, these many tests, is anyone else ready to step forward and admit that, just maybe the Kit lens is really good enough, and that the 24-70mm is not worth 4x the price?
I think the truth is that, on an A7R, the kit lens really is not good enough, nowhere near. Whereas the 24-70 just about is.The 24-70mm f4 has been tested, and then tested again, and again. :dh2:
It certainly is a nice lens, but apparently not a great lens like the 55mm FE.
Many of the tests are at 100%, and when comparing the 24-70mm f4 to other lens most are having difficulty "seeing" big differences.
I have asked a few reviewers of the 24-70mm f4 if they can "See" any difference in the images from that lens vs images from the 28-70mm Kit lens at "normal" magnification. Most have agreed that the advantages to the 24-70mm vs the 28-70 are the extra 4mm on the wide side (even though this is where the lens appears to be less than tack sharp); and the build quality.
I cancelled my pre-order for the 24-70mm with an A7, and got a 28-70mm and saved $900 (75%). I plan on using this saving towards the purchase of the 70-200mm f4.
After, these many tests, is anyone else ready to step forward and admit that, just maybe the Kit lens is really good enough, and that the 24-70mm is not worth 4x the price?
Werner:Some other thoughts:
The new A6000 looks not to bad as a second body!?
Would only use it wit FF FE lenses, sold all my APSC's with the NEX 7.
If AF performance is as good as promised, still to be seen, the A6000 with the FE24-70 would be a great combination as a second body.
On APSC the lens will be a extremely good 35-105 with OSS for events people etc....
And i think the price of the 6000 is seductive...
What do you think??
Of course not. By definition not. Focus shift refers to the tendency of a lens to shift its filed of focus further (more usually) or nearer as it is stopped down. I assumes that the lens is focussed wide open and then not refocussed as the aperture changes. This is exactly why lenses that exhibit focus shift are are a potential train smash on rangefinders and are not a problem with auto focus systems such as that of the A7R.Focus shift on CDAF? Wow.