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Archive 2014 · Zeiss Loxia line

  
 
edwardkaraa
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p.24 #1 · Zeiss Loxia line


http://www.zeiss.com/camera-lenses/en_de/camera_lenses/loxia/loxia235.html

http://www.zeiss.com/camera-lenses/en_de/camera_lenses/loxia/loxia250.html



Sep 02, 2014 at 04:31 AM
edwardkaraa
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p.24 #2 · Zeiss Loxia line


The published MTF do not look at all like the ZM counterparts.


Sep 02, 2014 at 04:34 AM
safcraft
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p.24 #3 · Zeiss Loxia line


Jochenb wrote:
Zeiss already announced the prices: Link

"The Loxia 2/50 will be available worldwide starting October 2014 and the Loxia 2/35 from the end of the fourth quarter of 2014. The recommended retail price of the Loxia 2/35 will be EUR 965.55* (US$ 1,299.00)* (excl. VAT) and that of the Loxia 2/50 will be EUR 713.45* (US$ 949.00)* (excl. VAT)."

Also interesting to see that the lenses are weathersealed (the blue rings are gaskets). I could be wrong, but I think that's a first for "true" Zeiss lenses?


Really ? How will those prices compete with the autofocus versions 35/2.8 and 55/1.8 ?
I can see the 35 being attractive to some with 1 stop (wow) faster and probably better optics (but the current one is very good and the new one probably has also ugly bokeh) but the 50 No way....the 55 is very very good.



Sep 02, 2014 at 04:47 AM
edwardkaraa
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p.24 #4 · Zeiss Loxia line


Both lenses seem to have a resolution dip in zone B. Interesting.


Sep 02, 2014 at 04:51 AM
edwardkaraa
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p.24 #5 · Zeiss Loxia line


safcraft wrote:
Really ? How will those prices compete with the autofocus versions 35/2.8 and 55/1.8 ?
I can see the 35 being attractive to some with 1 stop (wow) faster and probably better optics (but the current one is very good and the new one probably has also ugly bokeh) but the 50 No way....the 55 is very very good.


If you like manual focus and aperture dials, the choice is evident.




Sep 02, 2014 at 04:54 AM
twoeye
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p.24 #6 · Zeiss Loxia line


Loxia 2/35 images on flickr

Loxia 2/50 images on flickr




Sep 02, 2014 at 05:03 AM
edwardkaraa
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p.24 #7 · Zeiss Loxia line


twoeye wrote:
Loxia 2/35 images on flickr

Loxia 2/50 images on flickr



As usual, Zeiss needs better photographers. All distant shots seem to be focused at infinity, leaving weak lower corners with both lenses. I think the lenses are not optimized for the sensor stack of the A7/r, but something less radical, like the A7s and probably future models.



Sep 02, 2014 at 05:11 AM
Jochenb
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p.24 #8 · Zeiss Loxia line


edwardkaraa wrote:
As usual, Zeiss needs better photographers. All distant shots seem to be focused at infinity, leaving weak lower corners with both lenses. I think the lenses are not optimized for the sensor stack of the A7/r, but something less radical, like the A7s and probably future models.


Yes the example photos are always crappy.
Regarding the optimization for the sensor stack, this is what Zeiss says about it in their blog post:
"The Loxia lenses are optimized for digital full-frame sensors, and incorporate the approx. 2.5 mm thick low-pass and infrared filters in front of the sensor in the corresponding Sony cameras."




Sep 02, 2014 at 05:15 AM
Matt Grum
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p.24 #9 · Zeiss Loxia line


twoeye wrote:
Loxia 2/35 images on flickr


Can't say if it's field curvature or not but the corners look mushy on the Reichstag photo with the 35mm:

https://www.flickr.com/photos/carlzeisslenses/14833441204/sizes/o/

Could be an issue with technique, though as Edward states.

No EXIF information unfortunately, if that's stopped down then that's not great for landscape/cityscapes (the FE35 does better). Bokeh in the "close up" cannon shot is not exactly blowing me away (could be a difficult subject).

The 2/50 images look much nicer, though.



Sep 02, 2014 at 05:22 AM
Tariq Gibran
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p.24 #10 · Zeiss Loxia line


Matt Grum wrote:
No EXIF information unfortunately, if that's stopped down then that's not great for landscape/cityscapes (the FE35 does better).


Yes, too bad we don't know the EXIF info.




Sep 02, 2014 at 05:27 AM
edwardkaraa
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p.24 #11 · Zeiss Loxia line


Matt Grum wrote:
Can't say if it's field curvature or not but the corners look mushy on the Reichstag photo with the 35mm:

https://www.flickr.com/photos/carlzeisslenses/14833441204/sizes/o/

Could be an issue with technique, though as Edward states.

No EXIF information unfortunately, if that's stopped down then that's not great for landscape/cityscapes (the FE35 does better). Bokeh in the "close up" cannon shot is not exactly blowing me away (could be a difficult subject).

The 2/50 images look much nicer, though.


Indeed the photographer seems to have focused on the Reichstag building, leaving weak corners, even if stopped down. What I don't like is the weak borders. I'm pretty sure it's the 0.5mm difference that Jochen pointed out. The lenses are designed for 2.5mm glass cover, the actual cover is 3mm. I'm sure future models will be 2.5mm though. A huge improvement over the ZM for sure but still not optimal.




Sep 02, 2014 at 05:29 AM
Tariq Gibran
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p.24 #12 · Zeiss Loxia line



...

Regarding the optimization for the sensor stack, this is what Zeiss says about it in their blog post:
"The Loxia lenses are optimized for digital full-frame sensors, and incorporate the approx. 2.5 mm thick low-pass and infrared filters in front of the sensor in the corresponding Sony cameras."



"...corresponding Sony cameras"

Sounds like Sony will be releasing new FF E-Mount cameras soon. Probably on the market by the time the Loxia 35/2 ships at the end of the year.



Sep 02, 2014 at 05:49 AM
Tariq Gibran
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p.24 #13 · Zeiss Loxia line


Hmm, the Loxia 50 looks like it's going to be a really nice lens. I'm digging it's rendering in the posted examples.


Sep 02, 2014 at 06:07 AM
Matt Grum
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p.24 #14 · Zeiss Loxia line


edwardkaraa wrote:
What I don't like is the weak borders. I'm pretty sure it's the 0.5mm difference that Jochen pointed out. The lenses are designed for 2.5mm glass cover, the actual cover is 3mm


The only source I've seen for the thickness of the A7R filter stack is the LensRentals blog post which states it is approximately 3mm but is very difficult to measure. Sounds like it could actually be 2.5mm

It seems possible that the stacks are the same height across Sony sensors but slight differences in filter composition, AA filtration and pixel pitch give rise to the differences in rangefinder lens performance between the different A7 bodies.


Tariq Gibran wrote:
Regarding the optimization for the sensor stack, this is what Zeiss says about it in their blog post:
"The Loxia lenses are optimized for digital full-frame sensors, and incorporate the approx. 2.5 mm thick low-pass and infrared filters in front of the sensor in the corresponding Sony cameras."

"...corresponding Sony cameras"

Sounds like Sony will be releasing new FF E-Mount cameras soon. Probably on the market by the time the Loxia 35/2 ships at the end of the year.


Pretty sure they're just referring to the A7, A7R and A7s, which may well all have 2.5mm stacks.




Sep 02, 2014 at 06:36 AM
Jochenb
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p.24 #15 · Zeiss Loxia line


I also think that Matt.

Here's another 50/2 sample gallery on Flickr:

Loxia 50/2 album

(with EXIF this time)



Sep 02, 2014 at 06:45 AM
edwardkaraa
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p.24 #16 · Zeiss Loxia line


Matt Grum wrote:
The only source I've seen for the thickness of the A7R filter stack is the LensRentals blog post which states it is approximately 3mm but is very difficult to measure. Sounds like it could actually be 2.5mm

It seems possible that the stacks are the same height across Sony sensors but slight differences in filter composition, AA filtration and pixel pitch give rise to the differences in rangefinder lens performance between the different A7 bodies.


Pretty sure they're just referring to the A7, A7R and A7s, which may well all have 2.5mm stacks.



Of course that is also possible, but I hope you're wrong, because the samples show some undercorrection of the astigmatism and field curvature in the corners and borders. This performance would not be satisfactory to me.




Sep 02, 2014 at 06:52 AM
Tariq Gibran
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p.24 #17 · Zeiss Loxia line


edwardkaraa wrote:
Of course that is also possible, but I hope you're wrong, because the samples show some undercorrection of the astigmatism and field curvature in the corners and borders. This performance would not be satisfactory to me.



Unless the samples in question were taken at F2 - F4. Really too bad we don't know the F-stops.




Sep 02, 2014 at 06:57 AM
edwardkaraa
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p.24 #18 · Zeiss Loxia line


Tariq Gibran wrote:
Unless the samples in question were taken at F2 - F4. Really too bad we don't know the F-stops.



This shot with the planar at f/11 is sharp across the frame:

https://www.flickr.com/photos/berlinbackstage/15112810421/sizes/o/

And this one at f/4 isn't bad at all:

https://www.flickr.com/photos/berlinbackstage/14929166700/sizes/o/

Brickwall at f/8 excellent too:

https://www.flickr.com/photos/berlinbackstage/14929251598/sizes/o/






Sep 02, 2014 at 07:06 AM
Tariq Gibran
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p.24 #19 · Zeiss Loxia line


edwardkaraa wrote:
This shot with the planar at f/11 is sharp across the frame:

https://www.flickr.com/photos/berlinbackstage/15112810421/sizes/o/

And this one at f/4 isn't bad at all:

https://www.flickr.com/photos/berlinbackstage/14929166700/sizes/o/



I thought you were referring to the Biogon 35, which I have concerns about.

Particularly after the last link for more samples, I'm really sold on the Planar. The rendering reminds me a lot of the classic 80 Planar as used on my old blad. I like it wide open and it looks very sharp accross the frame by F8 (likely 5.6 as well). It's a lens I will most likely buy.




Sep 02, 2014 at 07:11 AM
edwardkaraa
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p.24 #20 · Zeiss Loxia line


Tariq Gibran wrote:
I thought you were referring to the Biogon 35, which I have concerns about.

Particularly after the last link for more samples, I'm really sold on the Planar. The rendering reminds me a lot of the classic 80 Planar as used on my old blad. I like it wide open and it looks very sharp accross the frame by F8 (likely 5.6 as well). It's a lens I will most likely buy.



Totally agreed. So far the 35 seems to be the weaker of the two. But I will reserve my judgement until we see more samples with exif.




Sep 02, 2014 at 07:13 AM
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