08-09-2010, 10:44 AM
Hi Markus,
Thanks! It does look again like we see the real performance of this lens as it really is now, being tested with high MP cameras sporting a relatively less agressive AA-filter. For the type of lens, I think it is an excellent one, it doesn't get all that much better.
Regarding the focus shift: I reckon if you can micro-adjust the AF of this lens a little, you won't notice the focus shift in real life anymore, as it seems to be only millimetres (even if it persists till F/5.6). I don't know if that is an option of the D3X however.
Regarding LoCas I do have a request. Could this please be called by its official name of spherochromaticity from here on? The reason I am asking is that I see a lot of confusion in other forums about this; people think it is just a form of standard CA and that it can be corrected easily. As you state, it can be corrected, but not easily, as it requires a fair amount of masking work and specifically addressing parts of colour channels, while normal CA correction one can do at the touch of a single slider on Photoshop and other PP software. Using the official term for this may help in alleviating the confusion.
Kind regards, Wim
Thanks! It does look again like we see the real performance of this lens as it really is now, being tested with high MP cameras sporting a relatively less agressive AA-filter. For the type of lens, I think it is an excellent one, it doesn't get all that much better.
Regarding the focus shift: I reckon if you can micro-adjust the AF of this lens a little, you won't notice the focus shift in real life anymore, as it seems to be only millimetres (even if it persists till F/5.6). I don't know if that is an option of the D3X however.
Regarding LoCas I do have a request. Could this please be called by its official name of spherochromaticity from here on? The reason I am asking is that I see a lot of confusion in other forums about this; people think it is just a form of standard CA and that it can be corrected easily. As you state, it can be corrected, but not easily, as it requires a fair amount of masking work and specifically addressing parts of colour channels, while normal CA correction one can do at the touch of a single slider on Photoshop and other PP software. Using the official term for this may help in alleviating the confusion.
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....