wolfloid wrote:
Well that is a lot of info on MTFs, but as far as I am aware most manufacturers do not test the real MTFs for lenses, they are mostly theoretical, and when they do, they cherry pick. I don’t doubt that the APO is an extraordinary lens, but remember, Leica are salespeople, trying to sell high quality lenses and a myth to those with deep pockets.
Looking very closely at Fred’s testing on a large screen, it is hard to see how the GM could be bettered - and I trust my eyes. Even if the APO does turn out to be better ‘off axis’ which from looking at the GM results I very much, doubt, it will very definitely not result in the GM ‘not coming close’, and that is exactly hyperbole.
For some reason you seem illogically stuck on the work "hyperbole" which is again a subjective not objective term. Yet you don't apply that to Fred's equally strong statement. Also remember that Fred was referencing only resolution, while I was referencing the overall characteristics of the lenses. One person's hyperbole is another's opinion. I think we can move on from that and just discuss the lenses.
Bad lenses look good on screens. On screen video is even worse for this. That is not a good way to try and judge a lens. Better a a starting point. Especially when considering that actual data from highly credible sources proving to the contrary exists. Screens are relatively low resolution devices. Also, keep in mind that the images Fred posts are jpegs, and highly reduced in resolution to fit the screen and website resolutions. Not exactly a good set of circumstances to make the kind of judgements you are claiming is it. Better to work with the RAW data I think. However, even better when working with prints. Differences really stand out when an image is printed. The bigger you print, the more they are visible. Having printed from both lenses, I have seen the differences clearly.
I love the Sony 35mm GM. I made some very nice images with it. But under some conditions it did suffer rather badly from aberrations like CA. The Leica has virtually none. As an obvious example, look at this 35mm GM image from Dustin Abbot's testing. You will never see anything like this with the Leica APO-SL. One has to consider many things when evaluating a lens as I have pointed out.
