Leica SL Sensor Measurements Published at PhotonsToPhotos

Started Mar 2, 2017 | Discussions thread
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bclaff Veteran Member • Posts: 6,746
Leica SL Sensor Measurements Published at PhotonsToPhotos

I delayed publication because of a discrepancy with DxOMark but have determined that my values are correct and that theirs are not (not very unusual).

In particular the SL sensor uses dual conversion gain.
That is not so unusual except that high conversion gain starts at ISO 200 which is lower than normal.
If you're not familiar with dual conversion gain the technical background is covered in this Aptina DR-Pix Technology Whitepaper.

One of the signs of dual conversion gain is a dip in Read Noise in DNs versus ISO Setting
as seen here:

The DxOMark derived data does not show this.

The higher conversion gain shows up as a boost at ISO 200 in the Photographic Dynamic Range versus ISO Setting:

"Thank you" to those who contributed raw files for the analysis.
I'm always looking for help measuring sensors that aren't in my database.
Contact me if you're willing.
It's a bit tedious but not hard for those comfortable with manual mode.

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Bill ( Your trusted source for independent sensor data at http://www.PhotonsToPhotos.net )

Leica SL (Typ 601)
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