Sometime ago in p538 #1 post Samuli Vahonen wrote: The main differences from my point of view (and in order I find them causing 85P to have it\'s characteristics):
- 85P lower contrast in bokeh (black are not as black and colors due to that less saturate) [this is the optical character, what makes the biggest difference to me]
- 85P has less CA errors in bokeh areas very close to the plane into which user focused, or they are less visible (I have many 100MP photos ruined by having magenta cast behind subject and green cast in front of subject, mostly this is only issue on urban environment, I can\'t remember having ANY nature photos ruines by this, but fabrics, concrete/asphalt etc. can pick up this rather ugly)
- 85P @ f/2.8 is \"as good as it get\" for from bokeh point of view, while 100MP still struggles even at f/3.2 and sometimes even f/3.5 (if you shoot my stuff, e.g. mid distance forest shots the corners are constant issue - if I would shoot urban stuff this would be so easy to hide that this never would be any problem)
- 85P doesn\'t have practically any vignetting @ f/2.8, while 100MP vignettes more even at f/4 (concerns only mid and far distances, close-ups and macros don\'t vignette)
- from f/2.8 to f/8 there are no practical differences in details in the plane I have focused, at f/2 100MP beats 85P clearly, and diffraction eats less 100MP detail in f/11 (both suck as bad @ f/16) [the practical for me is A2 size prints, pixel peepers for sure find differences, but that is their problem, I could not care less pixel peeping, if I would like to get larger than A2 I anyway would shoot panorama]
- 85P focus shift, if mitigated doesn\'t cause any image quality issues.
I just want to share my findings about 100MP and 85P bokeh differences that may correspond to Samuli\'s experience.
If shot wide open lens gives a cat\'s eye shape to bokeh that is located out of the center of an image especially in corners and greater the distance the cat\'s eye shape is more exhibited. But (!) macro-planars seem to distort details in corners as well and they do it in the same way like if PS radial blur filter is applied.
How to deal with corner detail distortion? Is it possible to reduce the effect? Any solutions?
Johnahill\'s horse shots made by 100MP have radially distorted corner details too.
Edited by Guest
May 03, 2012 at 02:24 PM
Guest
Guest
Re: ZE/ZF/ZM Images (Official Thread!)
Sometime ago in p538 #1 post Samuli Vahonen wrote: The main differences from my point of view (and in order I find them causing 85P to have it\'s characteristics):
- 85P lower contrast in bokeh (black are not as black and colors due to that less saturate) [this is the optical character, what makes the biggest difference to me]
- 85P has less CA errors in bokeh areas very close to the plane into which user focused, or they are less visible (I have many 100MP photos ruined by having magenta cast behind subject and green cast in front of subject, mostly this is only issue on urban environment, I can\'t remember having ANY nature photos ruines by this, but fabrics, concrete/asphalt etc. can pick up this rather ugly)
- 85P @ f/2.8 is \"as good as it get\" for from bokeh point of view, while 100MP still struggles even at f/3.2 and sometimes even f/3.5 (if you shoot my stuff, e.g. mid distance forest shots the corners are constant issue - if I would shoot urban stuff this would be so easy to hide that this never would be any problem)
- 85P doesn\'t have practically any vignetting @ f/2.8, while 100MP vignettes more even at f/4 (concerns only mid and far distances, close-ups and macros don\'t vignette)
- from f/2.8 to f/8 there are no practical differences in details in the plane I have focused, at f/2 100MP beats 85P clearly, and diffraction eats less 100MP detail in f/11 (both suck as bad @ f/16) [the practical for me is A2 size prints, pixel peepers for sure find differences, but that is their problem, I could not care less pixel peeping, if I would like to get larger than A2 I anyway would shoot panorama]
- 85P focus shift, if mitigated doesn\'t cause any image quality issues.
I just want to share my findings about 100MP and 85P bokeh differences that may correspond to Samuli\'s experience.
If shot wide open lens gives a cat\'s eye shape to bokeh that is located out of the center of an image especially in corners and greater the distance the cat\'s eye shape is more exhibited. But (!) macro-planars seem to distort details in corners as well and they do it in the same way like if PS radial blur filter is applied.
