INDI CCD driver for Sigma cameras backed by a custom PTP for Sigma camera library : sigma-driver.

• USB PTP connection
• Discrete exposures (no BULB), nearest-time clamping
• ISO and exposure preset control
• JPEG path: decode to 8-bit mono and publish via ExposureComplete
• RAW path: DNG → 16-bit FITS with libraw + cfitsio
• Error states and logs compatible with Ekos
• Capture target selection: SD Card / RAM / Both
• Live View streaming
• Bulb mode

Dependencies:

• libindi
• libusb-1.0
• libjpeg
• libraw
• cfitsio
• libptp_sigma (no installation needed, source code obtained from git)

mkdir build && cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make -j
sudo make install

indiserver -v indi_sigma_ccd

Connect from KStars/Ekos and select Sigma DSLR.

• Check udev permissions for the Sigma VID/PID so the process can access the USB device.
• Enable driver debug in Control Panel and run indiserver -vvv indi_sigma_ccd for logs.
• Don't hesitate to open an issue and i will try to fix any problem.