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@Callum, you are right, it was a jpg export from Photo.

But as I wrote in the first post, why can „older“ programs open the files ? Fastrawviewer or Pixelmator or xnview … and the biggest “SURPRISE“ Affinity Photo on the ipad with ipados 18 can open the HEIC files

Maybe this is the root of this problem ?

Have you the latest IOS 18.0 installed?

Hi @Hangman, Thank you for the workaround, I hope Serif correct his code in the near future ...

Of course this is what I can do, but better to use this file in AP.

Hi @Hangman, here comes the requested HEIF Max file. IMG_1861.HEIC

No this is a 12MP Photo. PS: I made a test, a PRO-Raw file is opened in AP.

This is a standard HEIF file, no RAW!

I can't open a HEIC file from my iPhone 15 pro. All the other programmes ( Pixelmator, Exif Viewer, Fast Raw Viewer ... ) can do this, why can't Affinity Photo? MacOS Sequoia, Affinity Photo 2.5.5 IMG_1855.HEIC

They didn't make any promises, only in the first period (v1 period) you could read that between the lines. I have slept on it again and will not return to Adobe. Full stop!

seen in Lønstrup Denmark a few weeks ago.

I found this on YT - starting around 15:00 is Affinity related

I suggest a change especially for the "Unsharp mask" filter and his slider for radius. The controller is far too sensitive, even the slightest movement results in large steps. 0-4 is almost impossible to select. Trying to set a value in this range produces absurd values. One could say you have to manually insert the value but then a slider is meaningless…. I suspect the functionality was never subjected to an internal function/quality check ? Affinity Photo 2.5.2 on an iPad (8. Gen.)

Fwiw, for the delayed display of masks it helps to save the document.