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Author Topic: Rodenstock 24mm digital VS Mamiya 28mm  (Read 16044 times)

stefan marquardt

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Rodenstock 24mm digital VS Mamiya 28mm
« Reply #20 on: February 15, 2008, 03:20:07 pm »

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It seems that the Mamiya 28mm lens gives important chromatic aberrations,
PdF
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CA is realy nothing to worry about anymore. with lightroom I can even kill the CA that apears with my shift lenses - never mind the tiny bit of CA that the 28mm mamiya perhaps shows. what you want to look for in a wide lens like that is: does it produce any colorshift (green-magenta)? is it free of distortion? is it sharp even in the corners?



by the way simon: that last sample you showed looks realy good - it doesn´t seem to show any colorshift (my 35mm on the ZD does!). Did you clean that file up or is it straight of the sensor so clean?

stefan
« Last Edit: February 15, 2008, 03:30:45 pm by stefan marquardt »
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Don Libby

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Rodenstock 24mm digital VS Mamiya 28mm
« Reply #21 on: February 15, 2008, 09:48:04 pm »

Just found this thread and felt a need to respond about the Mamiya 28.  It is one of the very best lenses that I currently have.  That said I would normally post an image however I’m currently on my laptop and not in the studio – I’ll post an image soon as I can.

BTW Simon,  I think you have a “keeper”

don

stefan marquardt

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Rodenstock 24mm digital VS Mamiya 28mm
« Reply #22 on: February 16, 2008, 11:57:29 am »

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Hi Stefan,

how do you "kill CA" that appears with your shift lenses in Lightroom. Is this possible on the RAW side of the process?
Best,
Johannes
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hi johannes,

i use lightrooms CA slider till the ca goes. and set the edges-thing to: "all edges". as simple as that. i dont feel the need to extend the canvas anymore (like i use to with ps). doing it in raw is much better than in PS. dont know why. i can remove any ca from non-shift lenses (like the strong ca from the 35mm mamiya or the 30mm arsat) and even the CA from the fully shifted mamiya shift lens (which doesn´t show that much CA in the first place, though). I feel, when I do it in raw, all the sharpness of the file is kept - if I do it in PS the file goes a little soft.

stefan
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HarperPhotos

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Rodenstock 24mm digital VS Mamiya 28mm
« Reply #23 on: February 16, 2008, 09:36:58 pm »

Gidday,

When I took this shot the other day with my Mamiya 28mm lens I noticed a lot of purple colour fringing in the trees.

Even in Adobe Bridge CS3 I couldn't remove the purple fringing.

I came across this plugin by Power Retouche and it seems to work very well.

I've only tried it as a demo

http://www.powerretouche.com/Color-fringe_tutorial.htm

Cheers

Simon
« Last Edit: February 16, 2008, 09:44:26 pm by HarperPhotos »
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Simon Harper
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