Luminous Landscape Forum
Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: chrismuc on December 02, 2012, 10:01:27 pm
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Where can I find the MTF curves of Phase One Schneider lenses online?
I neither see them published on the Phase One site (or the downloadable lens data sheets) nor at the Schneider site.
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Where can I find the MTF curves of Phase One Schneider lenses online?
I neither see them published on the Phase One site (or the downloadable lens data sheets) nor at the Schneider site.
Hi Chris -
If you click the "download data sheet" link for each lens (where offered), you'll get a downloadable PDF with the MTF data.
http://www.phaseone.com/en/Camera-Systems/Focal-Plane-Lenses/AF-Specifications.aspx
http://www.phaseone.com/en/Camera-Systems/Leaf-Shutter-Lenses/LS-Specifications.aspx
Steve Hendrix
Capture Integration
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If you click the "download data sheet" link for each lens (where offered), you'll get a downloadable PDF with the MTF data.
http://www.phaseone.com/en/Camera-Systems/Focal-Plane-Lenses/AF-Specifications.aspx
http://www.phaseone.com/en/Camera-Systems/Leaf-Shutter-Lenses/LS-Specifications.aspx
Steve Hendrix
Capture Integration
You can download a PDFs for most of the LS lenses, but there is no MTF chart in the PDFs.
Only for some of the non Schneider lenses.
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Where can I find the MTF curves of Phase One Schneider lenses online?
I neither see them published on the Phase One site (or the downloadable lens data sheets) nor at the Schneider site.
Don't worry about the MTF charts. As far as sharpness, fine detail and contrast goes they are excellent lenses.. The 110 inparticular.
The one thing you want to look into or consider is the Iris. The LS lenses I have tried have only a 5 blade iris.
This results in not that good bokeh and small out of focus high light rendering. Pentagon shapes rather than more pleasant circles.
Wide open they are nice, but stop down even one stop and the pentagon can show up on any defined out of focus highlights.
Here is a previous thread.
http://www.luminous-landscape.com/forum/index.php?topic=67434.msg533454#msg533454 (http://www.luminous-landscape.com/forum/index.php?topic=67434.msg533454#msg533454)
From that thread:
(http://www.luminous-landscape.com/forum/index.php?action=dlattach;topic=67434.0;attach=60789;image)
Example of 5 blade iris
(http://ih1.redbubble.net/work.5790460.1.mtd,375x360,n,s,NS0gQmxhZGUgQXBlcnR1cmUgYXQgZjIy,ffffff.jpg)
Example of 9 blade iris
(http://www.cameralabs.com/reviews/Nikon_Nikkor_AF-S_85mm_f1-4G/images/results/Nikon85f1-4G_contralight.jpg)
I wonder why Schneider chose a 5 blade iris in the Phase One Schneider designs when on their cine lenses they go
as high as 18 blades.
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Thx, yes, that is what I mean:
For the LS versions no MTF is available and actually the switching to the LS 110, 150 and 240 lenses at
http://www.phaseone.com/en/Camera-Systems/Leaf-Shutter-Lenses/LS-Specifications.aspx
does not work in my Safari browser.
(maybe it's confident information and I cannot access coz I'm in China:-)
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Thx, yes, that is what I mean:
For the LS versions no MTF is available and actually the switching to the LS 110, 150 and 240 lenses at
http://www.phaseone.com/en/Camera-Systems/Leaf-Shutter-Lenses/LS-Specifications.aspx
does not work in my Safari browser.
(maybe it's confident information and I cannot access coz I'm in China:-)
This is all the pdf shows:
(http://farm9.staticflickr.com/8062/8241156296_59eee36ded_c.jpg)
The Mamiya Phase One lenses on the other hand do show MTF
(http://farm9.staticflickr.com/8058/8240096863_7ba0cce582_c.jpg)
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Thx, yes, that is what I mean:
For the LS versions no MTF is available and actually the switching to the LS 110, 150 and 240 lenses at
http://www.phaseone.com/en/Camera-Systems/Leaf-Shutter-Lenses/LS-Specifications.aspx
does not work in my Safari browser.
(maybe it's confident information and I cannot access coz I'm in China:-)
Chris -
I'll see if I can track it down for you.
Steve Hendrix
Capture Integration