canon RF 24-240 corrections

Flowernut
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p.1 #1 · p.1 #1 · canon RF 24-240 corrections

I'm taking this lens on a bus tour trying to go light. I watched a scott Kelby review of this lens and the point he makes is you have to use photoshop or light room to correct the vignetting and chromatic aberrations using the "remove chromatic aberrations" and the "use profile corrections" features in the develop module at import. Might on occasion require some additional manual touch up on the aberrations.

The set up menu on the R5 and R5 mark II has some lens corrections in the menu. To you engage that and again in adobe or shoot it without camera correction and do adobe only?

Sep 04, 2024 at 05:48 PM

garyvot
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p.1 #2 · p.1 #2 · canon RF 24-240 corrections

Digital corrections are required for quite a few RF lenses (including the 24-240), as well as for lenses for other mirrorless systems. It is a design optimization that was not possible in SLR lenses which could also be used with film cameras.

While you can turn off in-camera lens corrections for many lenses, they are forced on for certain RF lenses, as the corrections are actually part of the lens design. These settings directly affect only JPEGs; for RAW images they are applied as metadata to be used by DPP.

Adobe Camera RAW and Lightroom both now automatically apply lens corrections by default as well. Adobe does not use Canon's metadata, but applies its own profiles. I believe this change in behavior was designed to accommodate these new lenses having digital corrections as part of the lens design. This includes corrections for both axial chromatic aberration and lens distortion.

So that was a long-winded way of saying that you really don't have to do anything if you are using either a Canon or Adobe workflow with this lens. The corrections should be automatically applied and everything should look great.

Sep 04, 2024 at 06:37 PM

rscheffler
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p.1 #3 · p.1 #3 · canon RF 24-240 corrections

Flowernut wrote:
The set up menu on the R5 and R5 mark II has some lens corrections in the menu. To you engage that and again in adobe or shoot it without camera correction and do adobe only?

The in-camera corrections would only be relevant if they're baked into the RAW files. AFAIK, distortion, noise, vignetting and CA corrections are not. As mentioned by Gary, Adobe appears to apply their own correction profiles, rather than using whatever op-codes Canon might embed in RAW files. But I'm not sure about Canon's DLO corrections. If you were going strictly in-camera jpeg, then yes, turn them on. BTW, when you review RAW files in-camera, you're actually viewing an embedded jpeg preview and that will have in-camera corrections applied.

FWIW, I have the RF 24-105 STM lens, which also has high distortion at the wide end, similar to the 24-240. In the camera's menu options under 'aberration corrections' (red menu), the option to turn distortion correction on or off is disabled and distortion correction is forced. I believe this is done to maintain a 'normal' corrected viewfinder image.

Sep 04, 2024 at 09:22 PM


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