RAW image recording / lens aberration correction

My question concerns how important image recording quality when considering to use the lens correction data. Although one of the EOS Utility Manual mentions how Digital Photo Professional can solve peripheral aberrations, it refers only to color corrections only for images like the FIRST recorded. What, exactly, are the choice of good recording quality and evil, regarding their correlation with correction data that the software uses to correct aberrations?

Peripheral illumination correction simply corrects optical vignetting is inherent in many lenses. In other words, it corrects the neighbors of illumination in the whole image, where without it the corners and the edges of the picture may be a little darker than the center of the image. It is more common in the wide angle lenses.

Correction of distortion and chromatic aberrations are only applied in camera when you process RAW files in JPEG format. So, in other words, if you want them to do behind closed doors you must have the camera set to produce JPEG or RAW + JPEG for these fixes to apply.

The same corrections can be applied in post-processing of Canon Digital Photo Pro RAW conversion software. If you have corrections allowed behind closed doors, then allow the DPP software treat 'in the know', he will apply them same as if it was behind closed. Alternatively, you can manually cancel the corrections in post processing.

Many other post processing RAW conversion software can do similar. For example, Adobe Lightroom (Adobe Camera Raw) is a correction of the lens profiles built in which can be applied automatically, as well as manual controls for three types of correction. Software DXO lens correction software still seems more advanced.

If done in post-processing, the result of RAW conversion can be a file type other than 8-bit JPEG, for example 16-bit TIF or PSD, etc.. If the treatment is done behind closed doors, you can get than JPEG files.

I hope this makes sense.

***********

Alan Myers
San Jose, California, USA.
«Market softly and carry a great lens.»
MATERIAL: 5DII, 7D(x2), 50D(x3), some other cameras, various lenses & accessories
FLICKR & EXPOSUREMANAGER

Tags: Canon Camera

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