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Author Topic: MTF curves of Phase One Schneider lenses  (Read 1584 times)

chrismuc

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MTF curves of Phase One Schneider lenses
« on: December 02, 2012, 10:01:27 PM »

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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Steve Hendrix

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Re: MTF curves of Phase One Schneider lenses
« Reply #1 on: December 02, 2012, 10:29:15 PM »

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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Steve Hendrix
Sales Manager, www.captureintegration.com (e-mail Me)
MFDB: Phase One/Leaf-Mamiya/Hasselblad/Leica/Sinar
TechCam: Alpa/Cambo/Arca Swiss/Sinar
Direct: 404.543.8475

FredBGG

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Re: MTF curves of Phase One Schneider lenses
« Reply #2 on: December 03, 2012, 02:48:45 AM »



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.

« Last Edit: December 03, 2012, 03:16:54 AM by FredBGG »
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FredBGG

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Re: MTF curves of Phase One Schneider lenses
« Reply #3 on: December 03, 2012, 03:22:57 AM »

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

From that thread:





Example of 5 blade iris


Example of 9 blade iris



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.
« Last Edit: December 03, 2012, 04:26:25 AM by FredBGG »
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chrismuc

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Re: MTF curves of Phase One Schneider lenses
« Reply #4 on: December 03, 2012, 04:26:00 AM »

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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FredBGG

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Re: MTF curves of Phase One Schneider lenses
« Reply #5 on: December 03, 2012, 04:40:37 AM »

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:




The Mamiya Phase One lenses on the other hand do show MTF

« Last Edit: December 03, 2012, 04:45:50 AM by FredBGG »
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Steve Hendrix

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Re: MTF curves of Phase One Schneider lenses
« Reply #6 on: December 03, 2012, 11:55:55 AM »

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
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Steve Hendrix
Sales Manager, www.captureintegration.com (e-mail Me)
MFDB: Phase One/Leaf-Mamiya/Hasselblad/Leica/Sinar
TechCam: Alpa/Cambo/Arca Swiss/Sinar
Direct: 404.543.8475
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