Canon Community

johnrmoyer · 05-01-2026

I have been experimenting with jpegli. I hope that some of this might be helpful to others. I have already requested on CPS an enhancement to DPP to use jpegli to encode JPG files. HIF files are superior to JPG, but not all web browsers will display ...

johnrmoyer · 03-20-2026

I made another attempt to prompt the free version of Anthropic Claude AI to write a program. Teaching Claude to write a program seems to me more tedious than teaching a young engineer who has just completed college.The chat with my prompts and the an...

johnrmoyer · 02-21-2026

Today I downloaded DPP Version 4.21.11.0 Release date: 17 February 2026 and experimented. Release notes for this version say: ■Changes for Digital Photo Professional 4.21.11 for macOS :- Fixed issues with some file operations. While I did not do a...

johnrmoyer · 01-11-2026

I wrote a web page about software and image processing using Canon DPP and free software on macOS and on Debian Linux. I hope some of my examples might be useful to others. The Northern Cardinal is a very bright red color. In bright sunlight, the red...

johnrmoyer · 01-06-2026

In case one sees problems loading TIF files or JPG files saved by Canon DPP software, here are explanations. The most recent update to Gimp free software on Debian Linux can once again open TIFF files saved by Canon DPP. Imagemagick still cannot. The...

johnrmoyer · 05-08-2026

All of my EF and EF-S lenses work better on my EOS R5 than on my EOS 80D. The adapter does not change image quality. Older lenses might not be able to focus as quickly or may require more time between shots when you hold down the shutter button. I ha...

johnrmoyer · 05-05-2026

@Missytxo wrote: Is there a way I can understand how aperture, ISO, etc works? I found https://www.cambridgeincolour.com/tutorials.htm useful. Also, wikipedia is good: https://en.wikipedia.org/wiki/Aperture

johnrmoyer · 05-05-2026

@kvbarkley wrote: You also have to work to make sure that the camera is not automagically correcting for vignetting. @kvbarkley wrote: You also have to work to make sure that the camera is not automagically correcting for vignetting. You are correc...

johnrmoyer · 05-05-2026

I hope some of this might be helpful. For such a comparison, I suggest using manual mode, manual focus, and a remote trigger. For some cameras, the Canon Camera Connect app will work as a remote trigger without spending any money. If there are any cl...

johnrmoyer · 05-03-2026

exiftool free software will read shuttercount for some Canon cameras, but as others have said, it is not a very useful number on a camera that can use electronic shutter or do video. https://exiftool.org/

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experimenting with jpegli

I prompted Claude AI to write a program to manipulate camera raw files

Thoughts on DPP Version 4.21.11.0

Image processing using DPP and free software

Solutions for files saved by Canon DPP and problems loading them into other software

Re: Image Quality with EF to RF converter

Re: RF50 and Kit Lens - is it that bad?

Re: EFS 24mm hood comparison

Re: EFS 24mm hood comparison

Re: Checking the shutter count for R7

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