The last two nights showed again a large cloud-free zone over the Bremen area, which I used for further exposures with the Takahashi FSQ85 and the new camera. First, I made a comparison of the 460Exm and the 490Exm to see if there are differences between the two chips. On paper, the SONY ICX 814 sensor of the 490 is regarding the full-wave capacity with 12,500e behind the Sony ICX694 chip of the 460s with 18,000e.

(Detail) with Atik 460Exm, 600 Sec. H-Alpha 5nm. Chiptemperature: -15° C. Pixinsight AutoSTF.

Detail with Atik 490 Exm, 600 Sec. H-Alpha 5nm. Chiptemperature: -15° C.

Animation of the two images:

Original-FITS-Files for Download: 490-vs-460.zip