topic RAW image recording / lens abberation correction in EOS DSLR & Mirrorless Cameras

RAW image recording / lens abberation correction

character_stops — Tue, 30 Jun 2015 19:11:47 GMT

My question involves which image-recording quality matters when one is planning to use lens correction data. Although one of EOS Utility manuals mentions how Digital Photo Professional can resolve peripheral aberrations, it only mentions chromatic corrections only for images such as those recorded RAW. What precisely are right and wrong recording quality choices, in regard to their correlation to the correction data that software uses to fix aberrations?

Re: RAW image recording / lens abberation correction

jrhoffman75 — Tue, 30 Jun 2015 19:42:18 GMT

Can you post a screen shot of the section you are asking about, or at least the page number of the manual (and which version.)

Re: RAW image recording / lens abberation correction

character_stops — Wed, 01 Jul 2015 20:39:24 GMT

This is from the EOS Utility Disk Manual, p.24. It looks like data is REGISTERED or DELETED when it comes to peripheral illumination correction. Only in the parenthesis afterwards, does it mention chromatic correction, where there are other aberrations mentioned that don't really concern me. What does, however, are the terms that chromatic data is said to be USED during RAW processing on the camera. So, does that mean chromatic aberrations are fixed on the camera and not by the digital photo professional software only as long as you are shooting RAW? Also, could you correct peripheral illumination only with the software AFTER shooting RAW or can it be just a JPEG?

Re: RAW image recording / lens abberation correction

amfoto1 — Wed, 01 Jul 2015 22:49:53 GMT

Peripheral illumination correction merely corrects optical vignetting that's inherent to many lenses. In other words, it corrects the eveness of illumination across the entire image frame, where without it the corners and edges of the image might be a little darker than the center of the image. It's most common in wide angle lenses.

Distortion and chromatic aberration corrections are only applied in-camera when you process RAW files into JPEGs. So, in other words, if you want them done in-camera you must have the camera set to produce JPEG or to RAW+JPEG for these corrections to be applied.

The same corrections can be applied during post-processing by Canon Digital Photo Pro RAW conversion software. If you had the corrections enabled in-camera, then allow DPP software to process "as shot", it will apply them the same way as if it were in-camera. Alternatively, you can manually override the corrections in post-processing.

Many other post-processing RAW conversion softwares can do similar. For example, Adobe Lightroom (Adobe Camera Raw) has a lot of lens correction profiles built in that can be applied automatically, as well as manual controls for all three types of correction. DXO software appears to be an even more advanced lens correction software.

If done in post-processing, the end result from the RAW conversion can be a file type other than 8 bit JPEG, such as 16 bit TIF or PSD, etc. If the processing is done in-camera, you can only get JPEG files.

I hope this makes sense.

***********

Alan Myers
San Jose, Calif., USA
"Walk softly and carry a big lens."
GEAR: 5DII, 7D(x2), 50D(x3), some other cameras, various lenses & accessories
FLICKR & EXPOSUREMANAGER

Re: RAW image recording / lens abberation correction

jrhoffman75 — Thu, 02 Jul 2015 02:59:51 GMT

The EU info is not clearly stated. While many EOS DSLRs can apply peripheral illumination correction to JPEGs, certain cameras (6D, 5D Mark III, 1D X,) and maybe some others, can process RAW files in camera and apply lens aberration correction. There is a special menu option for RAW file processing. This is different than shooting RAW+JPEG.

Most RAW files downloaded to DPP can have full aberration correction applied if the lens/camera combination is supported by DPP.

Re: RAW image recording / lens abberation correction

ebiggs1 — Thu, 02 Jul 2015 14:23:41 GMT

A couple things to remember is, adjustments are not applied when shooting RAW. You do that in post. The camera does make a small data file that is used to make a jpg. This is displayed on the LCD. It is used to make a viewable picture on your computer, too.

And, in PS or LR the lens correction is adjustable. You can use the default settings provided by Adobe and/or you can change them to suit yourself.

If I understand what you are asking.

Re: RAW image recording / lens abberation correction

jrhoffman75 — Thu, 02 Jul 2015 14:32:22 GMT

http://www.learn.usa.canon.com/resources/articles/2011/whats_new_eos60d_incamera_article.shtml

Some cameras will do in-camera RAW processing, which is what the EOS Utility section was addressing.

Re: RAW image recording / lens abberation correction

jazzman1 — Fri, 03 Jul 2015 10:13:45 GMT

One thing not mentioned is the feature in Canon Cameras will not work with 3rd party lens, least not with mine. I have the Canon 60D with the "Peripheral Illumin. Correct" setting/feature, and it only works with my "Canon Lens". It won't work with "all" Canon lens. Only works with the ones that my camera has lens data for. My 60D does'nt have lens data for my EF 70-300mm L lens, but DPP does. If one has a 3r party lens, you have to use post software for that. Canon DPP does not have 3rd party lens data either. John is correct. Some cameras, as well as my 60D, will do RAW to JPEG processing in Camera.

Re: RAW image recording / lens abberation correction

jrhoffman75 — Fri, 03 Jul 2015 10:54:25 GMT

Can't you upload the correction data using the EOS Lens Utility?

Re: RAW image recording / lens abberation correction

jazzman1 — Fri, 03 Jul 2015 12:40:29 GMT

@jrhoffman75 wrote:
Can't you upload the correction data using the EOS Lens Utility?

Yes, i suppose so if Canon supplies them in EOS utility. I use DPP. But all they have available is data for 30 or so lens at this time. I downloaded all they include to DPP (in lens update option). As I said, they don't have data for my EF 70-300mm L, in my camera.. DPP includes more lens data than my camera ,but even in DPP some newer, and alot of older lens data, has been excluded. They may add more in the future.

Re: RAW image recording / lens abberation correction

ebiggs1 — Fri, 03 Jul 2015 12:32:47 GMT

"Some cameras, as well as my 60D, will do RAW to JPEG processing in Camera."

Any camera that does RAW+jpg will 'process' a RAW. So what? It is no where near what LR or PS (ACR9) or even DPP can do.

No matter what the conversion or correction is, in camera is not the place for it. Is it?

Why would Canon offer correction data for lenses it doesn't sell or make and doesn't even recommend their use? Maybe I just need some more coffee this morning!

Re: RAW image recording / lens abberation correction

jrhoffman75 — Fri, 03 Jul 2015 12:36:40 GMT

My error; I thought if DPP could download the data it could be uploaded to the camera. I know thats the case for my 1D Mark IV.

Re: RAW image recording / lens abberation correction

jazzman1 — Fri, 03 Jul 2015 12:51:45 GMT

Why would Canon offer correction data for lenses it doesn't sell or make and doesn't even recommend their use? Maybe I just need some more coffee this morning!

No offense Obiwan, but many newbies may not know that. How many come here for help with 3rd party lens??? I did'nt know when I got into DSLR's. Many don't know what you know about most stuff even.

And your statement about the better processing of RAW in post is correct, but for those who may not use post software, it's info for them.

Re: RAW image recording / lens abberation correction

jazzman1 — Fri, 03 Jul 2015 13:06:12 GMT

@jrhoffman75 wrote:
My error; I thought if DPP could download the data it could be uploaded to the camera. I know thats the case for my 1D Mark IV.

I suppose it varies in different models, I can only speak for my 60D, have'nt checked for all the others. Depends, if a camera has that option, some do, some don't. You have a Pro Grade Body.

Re: RAW image recording / lens abberation correction

ebiggs1 — Fri, 03 Jul 2015 13:31:08 GMT

"... for those who may not use post software, it's info for them."

Than don't shoot RAW! That absolutely makes no sense at all.

Re: RAW image recording / lens abberation correction

jrhoffman75 — Fri, 03 Jul 2015 13:52:40 GMT

I read on the Internet a while ago (for what ever veracity you want to apply) that the direct camera to printer (PictBridge) feature and then in-camera RAW processing was driven by the emerging "non-Western" market where immediate access to computers is limited.

One can shoot RAW and also have the ability for limited editing in-camera that could be printed or sent via WiFi.

Re: RAW image recording / lens abberation correction

jazzman1 — Sat, 04 Jul 2015 11:41:18 GMT

@jrhoffman75 wrote:
I read on the Internet a while ago (for what ever veracity you want to apply) that the direct camera to printer (PictBridge) feature and then in-camera RAW processing was driven by the emerging "non-Western" market where immediate access to computers is limited.

One can shoot RAW and also have the ability for limited editing in-camera that could be printed or sent via WiFi.

Thanks John for that info. I'll surely file it away for future reference

Forgot to say. My 60D has in Camera Editing of RAW files also. That's on top of also having RAW + JPEG, and RAW to JPEG Conversion.

Re: RAW image recording / lens abberation correction

jazzman1 — Sat, 11 Jul 2015 17:30:55 GMT

@jrhoffman75 wrote:
My error; I thought if DPP could download the data it could be uploaded to the camera. I know thats the case for my 1D Mark IV.

Hey John, you are right my friend.....My Error. I checked again my Canon Software and discovered that my "Lens Registration Tool", was no longer installed in EOS Utility. I faintly remember, I may have uninstalled that tool when I 1st installed my software, when I got my 60D....not knowing I would need Lens Registration Tool, later/now. I just now re-installed my software including EOS Utility and DPP and now have Len's Registration Tool installed. I downloaded all the Lens data for all my lens and also uploaded them to my 60D Camera, using EOS Utility as you stated. Sometimes I inadvertantly remove programs and software when I use "System Restore" on my Pc. Anything installed after I make a "restore point", gets removed if I restore my Pc using...."that restore point."

Thanks much you're a life saver, had you not said what you did I would have never discovered my error. And I learned something new about my camera. Another step on the road to discovery in learning Photography. I've learned alot here in the last day or so, you guys are a big help, but I always learn here everyday reading the posts.

Thumbs Up my friend

Re: RAW image recording / lens abberation correction

character_stops — Fri, 10 Jul 2015 17:58:34 GMT

Thanks for the input, man. I understand the difference now - that illumination corrections are in camera no matter what the image quality setting is - that you would have to either shot in RAW or L + RAW for the camera to process the chromatic corrections. Either way, I can see the post-process corrections available, at least in Lightroom, Photoshop and DPP. If I ever uncheck chromatic aberration correction, it will be to avoid decreasing the maximum burst for continuous shots. I just don't understand the point of having check boxes in those editing programs. It seems as long as you wouldn't touch any of the modifiers (sliders, etc.) it wouldn't affect any corrections already made in camera. So why bother unchecking the box for either correction?

Re: RAW image recording / lens abberation correction

character_stops — Fri, 10 Jul 2015 18:22:54 GMT

You just confirmed what I just found.