Zeiss Lens Photos and Discussion
/forum/topic/1009161/165

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Greggf
Registered: Aug 03, 2011
Total Posts: 3167
Country: United States

Cool shots too, Ronni...nice use of the 35! Haven't looked at them on my computer yet, but my iPhone, they look really detailed!!
Gegg



helimat
Registered: Apr 06, 2008
Total Posts: 3991
Country: Canada

Ronny; I really like your PP.

So, is much out there with the new ZE 25/2 yet?


Canon 6D + Zeiss 25/2 by helimat, on Flickr


Canon 6D + Zeiss 25/2 by helimat, on Flickr

Early impressions; Nicely balanced on the 6D. Reminds me more of the ZE 35/2 than the 35/1.4, only with vignetting like I have never seen before.



Ronny Olsson
Registered: Jun 24, 2012
Total Posts: 5053
Country: Sweden

Thanks

Helimat: Wow.. love the first shot



hiepphotog
Registered: Aug 19, 2009
Total Posts: 2527
Country: United States

Lovely pictures guys.

Since this is a zeiss lens photos and discussion thread, I think this post is appropriate (I don't want to just open a new thread for this). I hope you guys find this useful.

So finally, after a torturous wait of 10 weeks, my converted Contax lenses and the A99 are finally back from S.K. Grimes. The first time they went back, the two lenses were not calibrated correctly for infinity focus (the 85 was a hair off while the 55 was way off). However, the quality of the mounts are the best I have seen so far. Unlike the typical Leitax mount (excellent quality), there is no torsional flex with this mount, understandably so since these are custom made to fit. Adam Dau is very nice to talk to and he did agree to ship my stuff back via Express after the calibration. Top notch service.

Moving on to the next part, I just shot an aperture series at infinity with the Contax 55/1.2 for a performance evaluation on a FF. Initially, it was for my personal archives so I know the strengths at weaknesses of my lenses at various distances; however, I decided to share the result here. I'm thinking doing a bunch of these in the future with whatever Zeiss lens I have in hand. However, if everyone thinks this is useless, I will withdraw the post.

Testing conditions: I used a Feisol-equivalent of a Gitzo series 2 and the tripod was dampened further with my camera bag; there was slight breeze. A remote shutter release was used for all shots.

The test scene and crops:





I believe that the slanted shot is the best way to examine a corner-to-corner performance, a possibility of lens-camera skew/misalignment, and any de-centering and field curvature issue. This was how I discovered the severe astigmatism problem of the ZA 24/2.

3 crops are presented here to show the center, edge, and corner performance.

Processing: These are presented as-is with Lightroom default settings, except for my attempt to match the exposure of the 1st two apertures with the rest by using the exposure slider.

Measured MTFs:



The three MTFs were measured at infinity distance. The last MTF was measured by Marco Cavina. I presented these here so you guys can see the correlation.

Note: That is supposed to be 1.2 not 1.4.

Center:



I tried to match the exposure of 1.2 and 1.4 with other apertures. However, I only presented the matched results in the center; the edge and border are not matched. On the A99 sensor, there is not much different from 4 to 8. f/11 shows a visible drop in contrast, though slightly. On my NEX-7, f/4 would yield the sharpest center while f/8 shows sign of diffraction.

Edge:



Corner:



F/8 would yield the sharpest corner-to-corner result. The drop-off in the corners at f/5.6 is not as steep as suggested in the MTF measurement; my ZF 28/2 has the same drop-off and I can clearly see the mushiness. I would say the corners of the 55 are very sharp at f/8.

Field curvature, centering and other observations:



I see some forward (toward the near field) field curvature at f/4 in mid frame, but by f/5.6, it disappears (or at least not noticeable to me). There is no severe de-centering issue that I can see. CA is not as well-controlled as the latest Zeiss (the 25/2, 15/2.8, or 135/2) but pretty much on bar with rest.

I hope these are helpful for some (especially those with the Canon 50/1.2 L or the 55/1.2 Asph) to gauge the performance of their lenses. I also have the 85/1.2 results, but I'll wait to see any feedback from you guys to see if I need to improve the test. Hopefully, by this weekend, I have enough time to shoot some "real" shots.

*Update: Added Field Curvature and Centering Analysis.



Gunzorro
Registered: Aug 28, 2010
Total Posts: 8732
Country: United States

hiepphotog -- Very nice, thanks!

How about the opposite corner to check for alignment and check that field curvature?



hiepphotog
Registered: Aug 19, 2009
Total Posts: 2527
Country: United States

^^ Thanks Jim, I just added the field curvature and centering/alignment section as requested. If more people find this useful, I'll post a similar write-up for the 85/1.2 and the 28/2 I currently have.



carstenw
Registered: Dec 26, 2005
Total Posts: 16163
Country: Germany

Very interesting results! Some comments:

- The left side appears closer than the right, with the middle somewhere in between. Where did you focus? It is possible that a small amount of the softness loss is due to incorrect focusing plane for one or another shot. It would be nice to eliminate this by shooting something square on.

- This is just one distance, somewhere close to but not at infinity. I would be interested to see close-up and perhaps two mid distances as well, perhaps 3m and 10m.

- CA is not easy to judge in some parts of these images. Maybe another test series with tree branches?

- Flare/veiling flare is not possible to judge here. Maybe another series?



hiepphotog
Registered: Aug 19, 2009
Total Posts: 2527
Country: United States

^^ I actually used the center point on the A99 to focus with max zooming (focus was on the two vehicles in front of the building), so it was just the way I cropped that might make it look a bit off. With this shot, I don't need to worry about shooting squared on (that is the perk of shooting at infinity). All crops are at sufficient distance to be treated as they are on the same plane. This can be seen when look at the centering/misalignment crop (left and right essentially have the same softness toward the corners). As for the softness at 1.2, I would say it's still better than all the 50ish 1.2 I have tried before. Infinity test under bright sun is very demanding for any lens at this speed.

- Testing at any other distance less than infinity would require a much more careful alignment. I'm thinking of a set-up that is repeatable for future testing, but I have not come up with a good solution.

- I mainly look at in-focus/primary LoCA (the center crop) and TCA (those net hanging poles on the left). They're not presented on the crops. But tree branches and chrome surfaces can be done.

- Contrast loss due to flare can be done. I'll add that later.

Thank you for the comments Carsten. I hope my responses are satisfactory enough. I'm coming up with a fixed routine that can be used repeatably for future testing/comparison.



Gunzorro
Registered: Aug 28, 2010
Total Posts: 8732
Country: United States

Thanks for the added images and clarification. Very interesting!

I'm impressed with the low color fringing of this lens.



wayne seltzer
Registered: Dec 22, 2007
Total Posts: 4782
Country: United States

Hiep, thanks for the lens aperture series.
I would be interested in portrait distance performance and bokeh rendering. I am also interested in the 85/1.2 too.
I look forward to new zeiss 55/1.4 except for the price.



Lieutenant Z
Registered: Nov 21, 2010
Total Posts: 3777
Country: France

85 P :



Ronny Olsson
Registered: Jun 24, 2012
Total Posts: 5053
Country: Sweden

Great shot Z


Zeiss Makro-Planar T * 50mm f / 2 ZF.2 by Ronny Olsson, on Flickr

Carl Zeiss 1.4/85 ZF Vivitar Nikon AT-3/AI Extension Tube 36mm by Ronny Olsson, on Flickr



wfrank
Registered: Feb 09, 2011
Total Posts: 3217
Country: Sweden

Lieutenant Z wrote:
85 P :



Uhh I like that! A Renault I guess?



Lieutenant Z
Registered: Nov 21, 2010
Total Posts: 3777
Country: France

wfrank wrote:
Lieutenant Z wrote:
85 P :



Uhh I like that! A Renault I guess?


Yep, a "Juvaquatre" (1937-1960)



ktan7
Registered: Apr 26, 2013
Total Posts: 65
Country: Canada

Loving the Carl Zeiss Lense! That glass is amazing!!!



wfrank
Registered: Feb 09, 2011
Total Posts: 3217
Country: Sweden

CY 28/2.8 Canon 5D2


IMG_0697 1280 by Wilhelm Frank - Stockholm, on Flickr



Picture This!
Registered: Aug 03, 2010
Total Posts: 2186
Country: United States

Lovely pics you guys.

Philippe, as usual a shot with a lot of character.
Ronny, no words, just fantastic.
wfrank, great textures captured very well. Top compo.



Lieutenant Z
Registered: Nov 21, 2010
Total Posts: 3777
Country: France

thank you Manu.
Ronny, nice flowers as usual
Wilhelm ; I really like the rendering of your 28/2.8.



Ronny Olsson
Registered: Jun 24, 2012
Total Posts: 5053
Country: Sweden

Thanks Picture This and Z
Great shot Wihelm



Mescalamba
Registered: Jul 06, 2011
Total Posts: 3731
Country: Czech Republic



Just confirmation for myself, that I really do have Zeiss lens.

Cause with S5, you never know..


Btw. even tho its nice lens that PF is really p*ssing me off.



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