Sigma FP User Manual page 72

You can specify the memory bit count of DNG images.
To set the value, select [DNG+JPEG] or select [DNG] → [DNG Quality].
Memory Bit Count
Setting to [14 bit] provides a rich gradation; however, continuous shooting

speed becomes slow.
TIP
DNG (RAW format) is a record format based on the material properties.

Development process by SIGMA Photo Pro, etc. is required. SIGMA
Photo Pro can be downloaded free of charge from our website. Sigma
recommends that you always update SIGMA Photo Pro.
https://www.sigma-global.com/en/download/
If necessary, you can create JPEG images from DNG images with the

camera. Refer to "DNG Development" (page 126).
DNG is the RAW image data that is developed by Adobe Systems

Incorporated.
IMAGE SIZE SETTING
Quick Set menu, or [
HIGH
When the image quality is set to DNG+JPEG, both the DNG and JPEG

files are recorded with the specified image size.
72
12 bit
Set the number of record pixels (image size) of an image.
SHOOT] → [Image Size]
24M 6,000 x 4,000 (When it is set as 3:2)
(Default)
MED
12M 4,240 x 2,832 (When it is set as 3:2)
LOW
6M
14 bit
3,008 x 2,000 (When it is set as 3:2)
(default)