If you shoot raw with the settings ISO 100, f/16 and 1/100 sec, then the raw image in the raw file will be the same as the one you take with ISO 200 HTP, f/16 and 1/100 sec. Or with modern Canon cameras, the same as ISO 50, f/16 and 1/100 sec.
Useful tools for you are:
- Magic Lantern and its Raw based exposure feedback
- darktable with raw clipping indicator turned on
- RawDigger
- Hraw
With HTP you get:
- a brighter embedded JPEG
- ISO 200 written in Exif instead of ISO 100
- HTP tag in Makernote changed from off to Enabled or Enhanced.
- a brighter preview in the a digital viewfinder
The HTP tag is what Canon Digital Photo Professional and Lightroom read when they apply the tone curve.
I never use HTP. I just use exposure compensation and set it to -1 instead if that is what I need.
Apr 15, 2026 at 01:06 PM
Previous versions of Kameratrollet's message #17021326 « Highlight Tone Priority? »
