[Klaus]

[url="http://www.opticallimits.com/canon_eos_ff/537-zeiss50f14eosff"]http://www.opticallimits.com/canon_eos_ff/537-zeiss50f14eosff[/url]



Not as good as expected

[Guest]

Thanks a lot for the test. Very informative, as usual. It would be great if one could compare this lens to canon's 50 1.4. Any chance this lens will be tested soon?

[Guest]

Hum. Any comments comparing this lens to the voigtlander 58f1.4 (tested) and the canon 50f1.4 (not tested) ? From the test results it looks like the voigtlander has a bit higher resolution but bokeh is a bit worse; but there might be other comments to be made from actual usage (rendering and such) hence the question.

[Klaus]

[quote name='you2' date='25 July 2010 - 03:04 PM' timestamp='1280063098' post='1291']

Hum. Any comments comparing this lens to the voigtlander 58f1.4 (tested) and the canon 50f1.4 (not tested) ? From the test results it looks like the voigtlander has a bit higher resolution but bokeh is a bit worse; but there might be other comments to be made from actual usage (rendering and such) hence the question.

[/quote]



I reckon that I will test the EF 50mm f/1.4 soon. The V58/1.4 is not available in EOS mount which is a bit of a (further) drawback compared to the Zeiss. The V58 has a strange bokeh. I wouldn't call it bad .... just strange. Whether you like it or not is a very personal thing.

[pixee]

thanks for the test report for zeiss 50f1.4! Also this is very informative. I was a little surprised of the weak border resolution with 5DMk2 at lower apertures. I use Canon 50 f1.8 mkI, Leica 50 summicron, and also Zeiss

S-Planar 60mm macro and think that my 50mm 1.4 ze is a raelly good copy also in borders with 1DsMk2. Not as good as S-Planar macro, but good indeed.

[wim]

I must say this test reflects my own (real life, not test chart) test results (30+ 50s, so far <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='' />, including C/Y 50 F/1.4). Not so good over the whole frame until F/2.8 and then suddenly very good, although the Canon EF 50 F/1.4 is a bit more gradual, but has other problems. This is typical for the designs of fast 50s, i.e., F/1.4 and faster, except for very few totally new designs of late, and the old Olympus Zuiko 50 F/1.4, which gets good around F/2. Oh, and the Minolta Rokkor 58 F/1.2. Not really 50, but quite good too wide open. All of these designs really date from the 50s to 70s, with the exception of Sigma 50 F/1.4 and Canon 50L, and I do think that this type of lens needs a good rethink to shine.



Funnily enough, all slower 50s, F/1.7 and slower, tend to be good from wide open, certainly better than their F/1.4 siblings, and are generally just slightly less from F/2.8 up to and including F/5.6, and equal again thereafter. Two exceptions: the old M42 Jena Domiplan 50 F/2.8, and the Prakticar MC F/1.8 in bayonet. I always suggest avoiding those two <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='' />.



Kind regards, Wim

[Yakim]

[quote name='wim' timestamp='1280100483' post='1305']

Funnily enough, all slower 50s, F/1.7 and slower, tend to be good from wide open, certainly better than their F/1.4 siblings, and are generally just slightly less from F/2.8 up to and including F/5.6, and equal again thereafter. [/quote]



Exactly. The highest wide open resolution figures come from the Zeiss 50/2 and the lowly 50/1.8.

[Guest]

I´ve got a couple of questions:

1-Why the heck do I have a black rectangle on the forum, and I can not see but a fourth of the screen? Firefox user, yep.

2-Somewhere in the article says [but actually I don´t remember in which of the 3 Cosina lenses it is said] that those Cosina-Zeiss lenses only have autofocus confirmation on the ZE mount. Not true. The ZK mount does have focus confirmation, as it is something Pentax bodies always have had: the focus system is not depending on the lense attached [you will have focus confirmation even on old Pentax Screw mount or M42 lenses].

[mst]

[quote name='inaki' timestamp='1280173436' post='1322']

1-Why the heck do I have a black rectangle on the forum, and I can not see but a fourth of the screen? Firefox user, yep.[/quote]



Sorry, no idea. Does the rest of the site work for you? I'm sure Sebastian can look into this ...



[quote name='inaki' timestamp='1280173436' post='1322'] ... that those Cosina-Zeiss lenses only have autofocus confirmation on the ZE mount.[/quote]



THis was certainly meant in the sense that on an EOS camera only the ZE lenses offer focus confirmation.



Not only ZK users but Nikonians (ZF/ZF.2) have focus confirmation with these lenses as well.



-- Markus