Thursday, 11 February 2021

Experiments with AstroDMx Capture 16-bit preview controls and combining data from different cameras in post processing

Last month I used AstroDMx Capture for macOS with a 14-bit ZWO ASI178MC CMOS camera and a William Optics ZenithStar 66 SD Apochromatic refractor mounted on a Celestron AVX mount to image the Orion nebula.

Click on an image to get a closer view

The Equipment used


150 x 15s exposures were captured, the best 135 were stacked in Deep Sky Stacker and post processed in the Gimp, Affinity Photo, Topaz sharpen and Neat image.

The resulting image


Last night AstroDMx Capture for Linux was used with a 6-bit Atik 314L mono CCD camera fitted with a light pollution filter was used to capture FITS files of the Orion nebula using the same William Optics apochromatic refractor and Celestron AVx mount.

60 x 45s exposures and 40 x 15s exposures were captured with matching dark frames.

The preview controls were set to give a pleasing preview of the 16-bit images being captured.

Screenshot of AstroDMx Capture for Linux capturing FITS data on the Orion Nebula


The FITs files were stacked in Deep Sky Stacker and the resulting image was post processed in the Gimp 2.10

The Orion nebulae


Picture Window Pro 2.5 running in Wine was used to overlay the luminance data from the monochrome image over the Chrominance data of the colour image, blending the images using shift, rotate and scale.

The final image was post processed using Photoshop elements and EasyFoto by softmaker.

The final image of the Orion nebula


The total exposure time for this image was 1.48 hours.



The same telescope and mount with the Atik camera was used to capture 50 x 90s Fits exposures of the Rosette nebula with matching dark frames.

The equipment used


The 16-bit preview controls were adjusted to give a pleasing preview of the images being captured.

Screenshot of AstroDMx Capture for Linux capturing 90s FITS exposures of the Rosette nebula

The FITS files were stacked in affinity Photo and the result was post processed in the same software.

The Rosette nebula

This image was obtained with a total exposure time of 1.25 hours.