Huginn Kenningar
Second Officer
Flight distance : 49635259 ft
Spain
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hallmark007 Posted at 7-31 04:50
Just like all raw images there need to be lens corrections and these corrections are added to the software by developing software. Dji dng bakes in the lens corrections to cover distortion and vignetting you see in this image. For instance if you pop in your raw image to LR you will not need to correct vignetting or distortion and for other software programs like luminar who just updated mavic 3 dng files it will be the same.
You can also check and you will see files after are 20.1 mp as per advertising of the lens. Almost all lens both in drones and handheld require corrections for raw images.
Yep, all drones come with embedded lens corrections, wich despite the fact the lenses are not interchangeable, they should be optional, because embedded profiles are not perfect and any photographer could do a better job if they want.
We should have the option to deactivate the embedded lens corrections and apply our own corrections (or leave them uncorrected), it should be the photographer's decision, not the manufacturer decision (on the M3 doesn't have any sense to remove the embedded profile because image don't cover the entire sensor, so you'll allways have to crop, but in other drones like the 2S where the circle of image covers the entire sensor it should be optional).
On the other hand, and that was the problem I was pointing, the Mavic 3 is the only drone that I had in wich the image circle doesn't cover the entire sensor, on all the other drones I had (Mini 2, Air2S and Evo Lite+) the image circle of the lens covered the entire sensor.
Original DNGs are 5280x3956 (20.89MP), then the frame is cropped to roughly 5016x3762 (18.87MP) to get rid of the vignetting (wich is not lens vignetting you get on most optics, is lack of circle of image) and then upsampled to 5272x3948 (20.81MP), thus you lose quality, edges become soft, artifacts appear, and you can't do anything about it.
A good optical design leaves a margin between the end of the sensor and the end of the circle of image, because near the limit of the circle of image, the quality of the image is always going to be crappy. But on the M3 that near limit area is in fact a great part of the end image.
In fact, this is what you lose from the crop (above the full image exported with Rawdigger with the circle of image vignetting and with the approx crop painted on red, and then how you get it from Lightroom):
So yep, sensor cropping and lack of camera matching color profiles is a huge issue for a drone that pretends to be professional. They announce it as a 4/3 20MP sensor, which is not, is around 18.8MP and then upsampled, and they announce it has Hasselblad color profile, which it hasn't for the DNGs, and no professional photographer will ever shoot in JPG (wich has an atrocious editing embedded).
This "profesional" drone is far away from the modern FF mirrorless standard as far as for editing options and customization options. I can customize every single useful aspect of the post-process on my R6, and even my old 6D or my 30D from the Cretaceous had more options to customize what I wanted and didn't want to be applied on the image.
...but still the best drone you can get, sadly.
PS: Just look at this approx chart and remove the crop of the M3 sensor... well, not so far from the Air2S (wich ofc also crops a bit, but edges on the 2S could be usable if the lens profile would be optional). Still it's a better sensor with more dynamic range and with shadows full of details, but still you are not getting what you paid for.
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