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sonics
Joined: 13 May 2011 Posts: 15 Location: Netherlands
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Posted: Thu Nov 28, 2013 8:42 am Post subject: question about Zeiss 28mm f/2.8 distagon c/y + Canon 5D |
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sonics wrote:
I use a Zeiss 28mm f/2.8 c/y on my Canon eos 5D with much joy.
On f/2.8 - f/5.6 you can see some extreme corner softness. At f/5.6 there is a tiny bit left.
On another forum I read about the fact that on a analogue (contax) camera this lens is sharp in the extreme corners at f/2.8 and on a digital (fullframe) camera it isn't.
Is the true or what could be the cause of this? |
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ManualFocus-G
Joined: 29 Dec 2008 Posts: 6624 Location: United Kingdom
Expire: 2014-11-24
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Posted: Thu Nov 28, 2013 9:33 am Post subject: |
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ManualFocus-G wrote:
MM version is sharp in the corners, this version has a green minimum aperture on the aperture ring. _________________ Graham - Moderator
Shooter of choice: Fujifilm X-T20 with M42, PB and C/Y lenses
See my Flickr photos at http://www.flickr.com/photos/manualfocus-g |
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aoleg
Joined: 22 Feb 2008 Posts: 1389 Location: Berlin, DE
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Posted: Thu Nov 28, 2013 11:05 am Post subject: |
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aoleg wrote:
ManualFocus-G wrote: |
MM version is sharp in the corners, this version has a green minimum aperture on the aperture ring. |
It has better corners compared to the AE version, but at 2.8 even the MM version is not evenly sharp across the frame. I had both versions, and the MM was visibly better in the corners. I use mine mostly at f/8 where it produces superb sharpness and contrast across the frame. _________________ List of lenses |
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sonics
Joined: 13 May 2011 Posts: 15 Location: Netherlands
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Posted: Thu Nov 28, 2013 11:59 am Post subject: |
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sonics wrote:
I have the MMJ version (f/22 made green). I assume it wasn't painted green by the previous owner
f/2.8 is sharp across the frame except the extreme corners.
It gets better at f/4 and at f/5.6 only a tiny bit of unscharpness in the extreme corners are left. |
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sonics
Joined: 13 May 2011 Posts: 15 Location: Netherlands
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Posted: Thu Nov 28, 2013 12:26 pm Post subject: |
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sonics wrote:
I agree that at f/8 the lens providers superb sharpness, contrast. It's character is superb at all apertures.
For landscapes I use f/8 or narrower.
I also own a Zeiss distagon 35mm f/2 ZE. A better lens than my 28mm in many regards but I like the 28mm lens character better, but that's subjective.
aoleg wrote: |
ManualFocus-G wrote: |
MM version is sharp in the corners, this version has a green minimum aperture on the aperture ring. |
It has better corners compared to the AE version, but at 2.8 even the MM version is not evenly sharp across the frame. I had both versions, and the MM was visibly better in the corners. I use mine mostly at f/8 where it produces superb sharpness and contrast across the frame. |
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barryreid
Joined: 27 Aug 2013 Posts: 285 Location: London
Expire: 2015-11-04
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Posted: Thu Nov 28, 2013 2:34 pm Post subject: |
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barryreid wrote:
My 28mm AEJ seems acceptable at 5.6. Perhaps thickness variation in the adapter may make a noticeable difference to corner sharpness on a wide lens like this as there is going to be some field curvature? _________________ Canon + Contax + Minolta + Nikon + Olympus + Pentax + Yashica = Adaptall-2 |
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Attila
Joined: 24 Feb 2007 Posts: 57849 Location: Hungary
Expire: 2025-11-18
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Posted: Thu Nov 28, 2013 4:17 pm Post subject: |
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Attila wrote:
Rather lens faulty, I had a 28mm f2.0 what was sharp only at center, and even with all experience of my repair man he couldn't fix it , seems lens left factory with faulty.. _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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sonics
Joined: 13 May 2011 Posts: 15 Location: Netherlands
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Posted: Thu Nov 28, 2013 8:07 pm Post subject: |
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sonics wrote:
In my case not a faulty lens. I had 2 28mm f/2.8 MM over the years. First one I sold. Regretted it and bought another one. Both acted the same.
As I said before I read a topic telling about contax cameras not having this blurred extreme corners wide open till f/5.6 and fullframe digital camera do, like mine. I just wondered how this is possible.
Wide open I'm talking around 1/14th of the frame in the corner from top-down which is blurry
I use big-is adapters which focusses to infinity just fine. Not a problem there I think.
Attila wrote: |
Rather lens faulty, I had a 28mm f2.0 what was sharp only at center, and even with all experience of my repair man he couldn't fix it , seems lens left factory with faulty.. |
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aoleg
Joined: 22 Feb 2008 Posts: 1389 Location: Berlin, DE
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Posted: Sat Nov 30, 2013 10:17 pm Post subject: |
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aoleg wrote:
sonics wrote: |
Wide open I'm talking around 1/14th of the frame in the corner from top-down which is blurry |
Mine is about the same on FF sensor. I think this is typical for that lens. _________________ List of lenses |
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poilu
Joined: 26 Aug 2007 Posts: 10471 Location: Greece
Expire: 2019-08-29
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Posted: Sat Nov 30, 2013 11:29 pm Post subject: Re: question about Zeiss 28mm f/2.8 distagon c/y + Canon 5D |
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poilu wrote:
on my 28mm MM the borders are good from wide open
I didn't notice if the extreme corners are blurry, usually it is sky or ground there
for difference film - digital
read discussions about RF wide on the new Sony A7, Leica and Zeiss lenses that are jewel on film get pita on digital
the cause is that sensor 'see' only straight ray of light, silver grain of film don't care the direction of light and get burnt the same
the distagon is not an RF lens but in the extreme corners the angle is the greatest and I can believe that results are better on film
sonics wrote: |
I use a Zeiss 28mm f/2.8 c/y on my Canon eos 5D with much joy.
On f/2.8 - f/5.6 you can see some extreme corner softness. At f/5.6 there is a tiny bit left.
On another forum I read about the fact that on a analogue (contax) camera this lens is sharp in the extreme corners at f/2.8 and on a digital (fullframe) camera it isn't.
Is the true or what could be the cause of this? |
_________________ T* |
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eddie3dfx
Joined: 12 Sep 2013 Posts: 9
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Posted: Sat Dec 14, 2013 2:16 pm Post subject: |
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eddie3dfx wrote:
My MMJ is very sharp from 2.8 on.
In fact, I find it to be my favorite lens because of it's sharpness. |
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