Just purchased my first astro camera (ASI678MC) to use for widefield astrophotography with short focal length lenses.
It's mounted on a Star Adventurer (original version) and I intended to dither the SA (RA axis only) using the ST4 port on the ASI678MC, i won't be guiding. I'm using NINA on Windows and from what I have read this is possible by setting the telescope setting in NINA to use "ASI ST4 Telescope Driver". Have installed the latest ZWO drivers and latest version of ASCOM and ZWO ASCOM drivers.
When selecting the "ASI ST4 Telescope Driver" in NINA, it shows the ASI678MC camera to select, however, as soon as it is selected NINA throws up and error that the mount uses the B1950 epoch which is not supported by NINA and fails to connect.
As the ST4 interface on the SA isn't sending any data back to the camera this appears to the ZWO "ASI ST4 Telescope Driver" identifying itself as a mount using B1950.
Out of curiosity I decompiled the ZWO ASI ST4 Telescope driver ( C:\Program Files (x86)\Common Files\ASCOM\ZWO\ASCOM.ASIST4.Telescope.dll ) and confirmed that the ASCOM function call get_EquatorialSystem is hard coded to return the EPOCH ID for B1950. ( Code shown below).
@ZWO would it be possible to release a version of your Ascom ASI ST4 telescope driver which returns the mount type as J2000 ( int 2) rather than B1950 (int 4) or a version where the epoch can be selected.
Thanks, Mark.
// ASCOM.ASIST4.Telescope
// Token: 0x06000091 RID: 145 RVA: 0x00002EF3 File Offset: 0x000010F3
public EquatorialCoordinateType get_EquatorialSystem()
{
return EquatorialCoordinateType.equB1950;
}
