P: Camera Raw: Canon R5 Raw images are underexposed

First of all, you need to understand how the exposure mechanism works. There are many photography courses available on the internet where you can learn the basics of photography. Search on the internet for more. It is not easy to work with exposure. Still, when you finally understand its mechanism, you will be able to take adorable photos. Also, for a good direction, don't forget about choosing lenses suitable for your camera.

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@Rikk Thanks Rikk, very useful to provide the retrospective steps to fix the malalignment. 

@Rikk Thanks so much for this quick fix.

@Rikk

When will adobe have camera matched profiles for the latest canon cameras .... can adobe please make a statement as to what the issue with this is? Thanks

@Rikk I missed that. Thanks!

Note: In the official post I have included instructions to correct your previously edited photos, 

The issue was that LR classic 9.4 was rendering R5 RAWs underexposed by default. 10.0 does it correctly now but unfortunately the images you corrected manually in 9.4 are now re-rendered overexposed once you enter the Develop Module. I had to dial back the exposure in Develop but then the previews in Library will appear too dark. Rebuilding the previews in Library seems to solve this problem. 

The problem now is that previous R5 images which I have applied an increase in exposure to compensate for the bug now appears overexposed when re-exported from Lightroom Classic 10. Luckily I do not have too many of them. R5 RAWs that were converted to DNGs prior to import into Lightroom do not seem to be affected. 

Thanks for the update. I'm in the process of looking at the results now.