!!! YES !!! DLO can work with non compatible lenses !!!

kirkt wrote in post #15474638
I do not really use DPP with this feature very often, but what exactly does DLO do that permits it to be used outside of supported lens/body combinations? My limited understanding is that it corrects sharpness of a particular lens at a particular aperture across the field - does this require a specific profile (hence the "supported" lens concept)? How can this data or profile be applied to lenses that are not profiled and may exhibit different sharpness variations across their field?

I suppose it is one thing to "trick" DPP into applying some correction to raw data, it's another thing to get it to adapt its profile to a non-supported lens in a "correct" way.

Forgive my ignorance, I may be way overthinking this and probably do not understand just what DLO does.

Forge onward!

kirk

Yes you're right. If Canon for instance decides to provide a profile for the tamron 28-75, it will certainly provide even better results than what I have posted.
However what I have noticed is that even using a non dedicated profile provides better results than nothing. Certainly it's not 100% correct, but if it improves the overall IQ, why not use it ?

BTW : DLO doesn't correct sharpness only but also aberrations and other things...
See : http://web.canon.jp …g/dlo/factor/in​dex02.html

Gotcha. It should, in theory, also correct sharpness issues related to diffraction,the AA filter etc.

http://web.canon.jp/im​aging/dlo/effect/index​.html

It is essentially a spatially-dependent Optical Transfer Function that tries to reverse all of the aberrations and other badness and output the original image as it ideally should have been sampled. I suppose as long as the optical characteristics and flaws in the unsupported lens are similar in magnitude and distribution to the supported lens, then it should "work" better than no correction.

Sounds like you have an eager audience!

good luck!

kirk

Tutorial here : https://photography-on-the.net …/showthread.php​?t=1265354

yb98 wrote in post #15473996
Yes, I have found a solution to make DLO work with non compatible lenses and even with NON CANON lenses !

NICE!

It works with a 5DII and a Zeiss Makro-Planar T* 50mm f/2, assigned with the Canon EF 50mm f/1.2L lens type tag.

I am a mac user and I used the pyExifToolGUI application, along with exiftool, to modify the LensType tag.

http://panorama.dyndns​.org …GUI&texttag=pyE​xifToolGUI

Here is an image at 100% crop with okay focus (not great) shot with the above combination. I applied a +1 Sharpen in the RAW tab, and then applied to DLO at 100% and the closest shooting distance (slider to the left).

+1 sharp, NO DLO

Great work yb!

From a single quick test, the EF 85mm f1.2L profile seems indeed to work fine on 85mm f1.8 files, even at FF borders.

I used PhotoME EXIF Editor. Here you have to cycle the lens codes to find the intended supported lens for the first time, but when you find it, the lens designation is automatically correct.

The decimal code for the 85 f1.2L lens is 137. From now on, these three digits is all I need to input.
(The decimal code for the 85 f1.2L II lens is 239.)

This is 85 f1.8 @ f2.8, border, close to corner position (FF), 100% crop.

kirkt wrote in post #15476531
It works with a 5DII and a Zeiss Makro-Planar T* 50mm f/2, assigned with the Canon EF 50mm f/1.2L lens type tag.

Here is an image at 100% crop with okay focus (not great) shot with the above combination. I applied a +1 Sharpen in the RAW tab, and then applied to DLO at 100% and the closest shooting distance (slider to the left).

kirk

Nice to see that it works. However Canon recommends to put sharpening at 0 before applying DLO...

agedbriar wrote in post #15476800
Great work yb!

I used PhotoME EXIF Editor. Here you have to cycle the lens codes to find the intended supported lens for the first time, but when you find it, the lens designation is automatically correct.

The decimal code for the 85 f1.2L lens is 137.

Nice but too bad that you have to cycle through all the numerical values.
I'm wondering why they didn't put a list ?

I put it on 0 and there was still an effect. I just added some sharpening to accentuate it.

I would normally add a tiny bit of capture sharpening.

Kirk

Good work, thank you for sharing.

Paul

PaulSoebekti wrote in post #15478783
Good work, thank you for sharing.

Paul

You welcome.

There is one thing I really wish to be able to find : how to make DPP work with my old S30 powershot files. I know that there are specific parameters for each camera and that the result could be weired, but if it was possible to let DPP think that a powershot S30 raw file (or any non compatible camera file) is a file coming from another compatible camera, that would be wonderful.

It seems that my assumption that it's better to choose the compatible lens that has the nearest characteristics is wrong.
I have done some other tests with the tamron 28-75 and it seems that the Canon EF 28-200mm F3.5-5.6 USM provides better results than the Canon EF 28-70mm F2.8L.

Here are the tests.
At left, the original without DLO.
At the center, with DLO using the 28-70.
At right, with DLO using the 28-200.

This shot was taken at 75mm but I have also done a test with a shot taken at 28mm and still the 28-200 provides better results.
So it will be lot of work to test all the compatible lenses to determine the better one...

Sharpness=3

PC only?

R1200GS wrote in post #15483227
PC only?

no, see post #20 in this thread.

agedbriar wrote in post #15476800
Great work yb!

From a single quick test, the EF 85mm f1.2L profile seems indeed to work fine on 85mm f1.8 files, even at FF borders.

I used PhotoME EXIF Editor. Here you have to cycle the lens codes to find the intended supported lens for the first time, but when you find it, the lens designation is automatically correct.

The decimal code for the 85 f1.2L lens is 137.

This is 85 f1.8 @ f2.8, border, close to corner position (FF), 100% crop.

Seems to work very well. DLO is really a fantastic tool. But it seems it doesn't have the success it deserves. The reason is probably the fact that it double the file size. I hope that canon developers will find a solution to make the raw file keep the same size even when applying DLO. I'm sure in that case that DLO will become an exceptional feature.