Dicussions on four new small CCDs IMX183, IMX294 IMX385, IMX390, ( and a bit on GSense2020 BSI ) From Albéric posted on Webastro : For reading noise figures, be careful it depends on the gain and it also varies a bit from one sensor to another. In rapid CP, one works with high gain (60 to 90% approximately) values, but not at max gain. On the noise values, I would rather set the sliders to these values, looks more reasonable to me: IMX183: 1.3 e- IMX224: 0.75 e- IMX290: 1 e- IMX178: 1.5 e- Then a sensor with tiny 2.4 micron pixels is anything but soft and versatile. In deep sky it is limited to fast and expensive astrographs or a SC (Schmidt Cassegrain) equipped with Hyperstar. Want to equip a conventional Newton at F / 5 with an expensive reducer dedicated type ASA, it is also often embarking in a big galley side settings ... With 4.63 micron pixels, you can easily use classical instruments telescope...