Re: Zeiss ZE/ZF.2 35mm f/1.4 (according to Roger Cicala/lens rentals.com)
Randy,
I bet this slow focus transition with the undercorrected SA makes it hard to focus wide open as the focus point never comes into a fast sharp rendition while adjusting the focus. Is that fair to say?
The focus assist beap and light are never that accurate and are not be adjusted or improved by in camera microadjust feature which is for AF lenses. The beap gets you in proximity to the correct focus point but there is a range to this and you really need to rely either on your eyes in the viewfinder or use LiveView to nail the focus.
randyp01 wrote:
Your layman\'s explanation is MUCH appreciated, Wayne! Especially including that tidbit about the c/y 35 and 3D. I guess it\'s a give and take with this lens. :S I do like the look of the potted plant I shot but that bench shot posted up....too awesome.
I\'ll take a look at that article as well!
wayne seltzer wrote:
Randy, these look to be focused fine so don\'t worry.
If you read the CLN 35 article on Zeiss website that Luka provided the link to a little earlier in this thread, you will understand that Zeiss on purpose undercorrected the spherical aberration (SA) in order to get smoother transitioning bokeh in which OOF objects retain their shape longer/better as you go away from the focus point. The downside is that you get this veiling haze which makes the focus point look softer/less sharp than a lens with normal SA correction.
The old 35/1.4 has a quick focus to OOF transition which gives that more abrupt change where the lens goes from ultra sharp at the focus point to quickly blurring a very short distance away. For portraits, some people might not like that abrupt focus transition. This abrupt change is like the Z* 100/2 when used for portrait.
This new lens will have a lot harder time generating 3-d like the old lens does due to this.
To me the look of the new lens wide open is like putting a Softar sp? softening lens on the front of a normal zeiss lens.
Apr 05, 2011 at 05:40 PM
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