*** 5Dc vs 60D resolution test ***

Started Mar 17, 2013 | Discussions thread
qianp2k
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Re: please don't twist my photos
In reply to MAC, Apr 1, 2013

MAC wrote:

qianp2k wrote:

MAC wrote:

qianp2k wrote:

MAC wrote:

schmegg wrote:

qianp2k wrote:

I said you twisted it because you did completely wrong by zooming in LR that is only for viewing purpose but not for photo enlargement. The right way is thru Photoshop Bicubic enlargement.  If you did that correct way you will see the result I showed that is truly untwisted.  I gave the steps that everyone can duplicate.

It's not 'dark magic', it's simply zooming in on the raw data to see what has been recorded.

That is totally wrong way.  As I suggested, try bicubic enlargement in PS.  Again here is 100% cropped between two.  Look how different from yours.  This is the right way to show the real difference.

I'm sorry Peter, but this is just plain wrong.

If you use any type of enlargement algorithm such as "bicubic sharper" then you are interpolating, or 'inventing', detail that has simply not been recorded by the sensor! LOL!

What you are essentially saying here is that the difference will be in favour of the 5D if you use mathematics to estimate and insert information that does not exist in the raw file.

Sadly, mathematically inventing image detail does not equate to "more resolving abilities" - it is, in fact, a workaround one uses when they need more detail than the camera was capable of recording in the first place!

don't upsize or downsize.  just leave them side by side in photoshop and choose split screen and magnify/scale them together - then take screen shots

Do you or anyone generate JPEG files by taking snapshots in ACR/LR?  At least you need to generate the final JPEGs before comparing.   I upsampling 5D files for easier comparing at the same output size otherwise someone may get delusion that a bigger size is resolving more details.  Or we should leave them at their original sizes and compare the default processed JPEGs as DPR and IR labs do.  They don't compare photos in ACR/LR screen but default processed JPEGs.

In Lightroom generate the full size 16 bit psd's or tiffs to photoshop CS

leave them alone. fov is the same.  view them at the image level.  split the screen, then magnify the same way/size.  then screen capture the magnified screen shots

That sounds too complicated.  Why not generate JPEGs thru ACR/LR or DPP by default/zero setting and then compare them side by side with whatever photo viewer (such as Windows photo viewer)?  That's all creditable labs do such as DPR and IR.

jpg's are a quality reduction

You didn't realize your eyes do see RAW files directly but thru software interpretation.  Whatever you see in RAW processing software such as ACR is not better than converted JPEG.  No labs use ACR screenshots to compare IQ, no mention that's not your final result you will get anyway.  Even we leave in ACR by default at their respective original sizes, I still don't see 60D files have better IQ and resolve more details on outdoor school building.

keep the files whole 

Yeah, thru default/zero processing and we process respectively.  Remember you don't see RAW data directly but thru a software anyway

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