03-16-2012, 06:54 AM
[quote name='jerome' timestamp='1331876741' post='16762']
Let me cite myself:
You may also have noticed that the maximum aperture I used on the 35mm G was f/4 and not f/2.8. The reason is the following: that lens has been designed for film 20 years ago and left with noticeable residual spherical aberration so as to give a dreamy effect wide open. In simple terms: it is a great lens on the A900 but gives quite blurry pictures wide open on the NEX-7. At f/2.8 everything is still quite blurry and I can't really tell the difference between corners and center. It has nothing to do with the NEX sensor (apart from its resolution), it is a function of the lens.
(Emphasis added)
And maybe I should also add that wide-angle lenses faster than f/2.8 than would give sharp pictures on the NEX-7 sensor are rare.
Last but not least, I feel that there is no point in making a test for you, since you apparently dispute the validity of all tests which do not agree with whatever preconception of the results you have. I have no interest in convincing you, I only have interest in assessing the extent of the "problem" for current photographic practice.
[/quote]
That still leaves the 24mm f2 and the 24-70mm at 24mm f2.8.
And I have made abundantly clear why your tests are not valid. If you keep just ignoring those points, it just reinforces the impression that you are not actually wanting to do the tests because they will show something you are trying to deny and hide.
I take it you withdrew your offer for me to do the tests myself?
Let me cite myself:
You may also have noticed that the maximum aperture I used on the 35mm G was f/4 and not f/2.8. The reason is the following: that lens has been designed for film 20 years ago and left with noticeable residual spherical aberration so as to give a dreamy effect wide open. In simple terms: it is a great lens on the A900 but gives quite blurry pictures wide open on the NEX-7. At f/2.8 everything is still quite blurry and I can't really tell the difference between corners and center. It has nothing to do with the NEX sensor (apart from its resolution), it is a function of the lens.
(Emphasis added)
And maybe I should also add that wide-angle lenses faster than f/2.8 than would give sharp pictures on the NEX-7 sensor are rare.
Last but not least, I feel that there is no point in making a test for you, since you apparently dispute the validity of all tests which do not agree with whatever preconception of the results you have. I have no interest in convincing you, I only have interest in assessing the extent of the "problem" for current photographic practice.
[/quote]
That still leaves the 24mm f2 and the 24-70mm at 24mm f2.8.
And I have made abundantly clear why your tests are not valid. If you keep just ignoring those points, it just reinforces the impression that you are not actually wanting to do the tests because they will show something you are trying to deny and hide.
I take it you withdrew your offer for me to do the tests myself?