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Old 27th March 2012
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Ian Ian is offline
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m.Zuiko 12-50 back to back comparisons - the frame edges

By request following on from:

http://www.fourthirds-user.com/forum...ad.php?t=10778

..here are the frame edges. Pen E-P3, f/7.1, ISO 100, camera JPEGs (noise filter off) are just cropped - no other adjustments, RAWs are developed and adjusted in Lightroom 4.



WIDE ANGLE:


JPEG 12-50mm m.Zuiko frame edge


RAW 12-50mm m.Zuiko frame edge



JPEG 12-60mm Zuiko Digital frame edge


RAW 12-60mm Zuiko Digital frame edge



JPEG 14-54mm Zuiko Digital frame edge


RAW 14-54mm Zuiko Digital frame edge



JPEG 14-42 m.Zuiko II frame edge


RAW 14-42 m.Zuiko II frame edge



JPEG 12mm m.Zuiko f/2.0 frame edge


RAW 12mm m.Zuiko f/2.0 frame edge


TELEPHOTO:


JPEG 14-54mm Zuiko Digital frame edge


RAW 14-54mm Zuiko Digital frame edge



JPEG 14-42 m.Zuiko II frame edge


RAW 14-42 m.Zuiko II frame edge



JPEG 50mm f/2.0 Zuiko Digital frame edge


RAW 50mm f/2.0 Zuiko Digital frame edge



JPEG 12-60mm Zuiko Digital frame edge


RAW 12-60mm Zuiko Digital frame edge



JPEG 12-50 m.Zuiko frame edge


RAW 12-50 m.Zuiko frame edge



JPEG 45mm f/1.8 m.Zuiko frame edge


RAW 45mm f/1.8 m.Zuiko frame edge

Comments welcome.

Ian
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Last edited by Ian; 27th March 2012 at 12:21 PM. Reason: Some corrections made
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Old 27th March 2012
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Re: m.Zuiko 12-50 back to back comparisons - the frame edges

They are all good but the RAW 14-54 frame edge and the RAW 45-mm frame edge really stand out for me.
Pete
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Old 28th March 2012
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Re: m.Zuiko 12-50 back to back comparisons - the frame edges

Hi Ian

First of all a big thank you for doing this for us. Seems a fair amount of work.

The 12-50 in this did a lot better than I expected. You had pictures earlier which I thought left quite bit to be desired. Is it the same lens or is this a different example?

If you look at photozone or lenstip good lenses peak at f/4 (centre). At f/7.1 they already degrade due to diffraction. The Zuikos are typically that good that they gain very little by stopping down. Ok if you stop down 1 stop it will help the boarders. Unless there is something special I won't go beyond 5.6. As pointed out by lenstip this is the prob with an 6.3 lens you only have apertures which are affected by diffraction.

Considering sharpening did you apply the same to all or did you do them individually? You seem to have used quite aggressive settings here. I agee this motive can take it - however for many other motives this would be overdone on my books.

One other question: at which focal length does this become a 5.6 lens?

Thanks again
Joachim
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Old 28th March 2012
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Re: m.Zuiko 12-50 back to back comparisons - the frame edges

Hi.

In the Lenstip review http://www.lenstip.com/334.4-Lens_re...esolution.html, you can see that at 28mm the lens is almost at f:5.6.
In the same review, the samples page has several shots apparently taken "wide open": 12mm, f:3.5; 22mm, f:4.9; 25mm, f:5.1; 31mm, f:5.5; 36mm, f:5.7.

This is what I think we will have in this lens...

Best regards,
Rogerio
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