It's hard to recommend the ideal settings of a camera because they depend on your particular conditions and the target that you are imaging. However, here are some pointers to help you get started:
Dew Heater
Unless you live in a very dry area, it's convenient to have it ON.Target Dew Heater Strength
Depending on your weather, keep it off if you live in a dry place. If you live in a very humid area like Florida, raise it to 4.Offset
100 is a good starting point.Conversion Gain (HCG vs. LCG)
It depends on your target and the trade-off between how much dynamic range you want and how long you can make your sub-exposures before getting elongated stars or star trails. You can start by using HCG and see how it feels.
If you want maximum dynamic range, excellent tracking, and the ability to spend a lot of time on a target, then try LCG.Ultra mode or Low Noise
ON is preferred because it provides a higher signal-to-noise ratio at the expense of a lower frame rate. However, if you are doing lucky imaging and need a higher frame rate, it should be OFF.High Fullwell Mode
ON is nice.Fan Speed
This setting is only visible in some of the native camera integrations (e.g., NINA). It should always be 1 while the TE cooler is running.Gain
Use 100 if you have excellent tracking, your target is bright, and you want maximum dynamic range. However, if your target is dark, your tracking gives you elongated stars, and you have no way to improve them, then raise the gain to shorten the sub-exposures until the stars are round. Keep in mind that this will reduce your dynamic range, but you will still be able to get decent images.Temperature
We recommend cooling the sensor down to just 0 degrees Celsius because below this temperature, return is diminished, and you'll be subjecting the sensor to thermal stress unnecessarily. However, if the outdoor temperature is below zero Celsius, you may want to cool down the sensor at a lower temperature to maintain a stable and known temperature value that you can match later when creating dark frames. We do not recommend using the camera with the TE cooler OFF because the camera can get very hot.
To better understand each setting, please consult the pages dedicated to each setting.