A few days ago I received my ASI 294MM. Fantastic camera, however it has some annoying reflections on very bright objects when using narrow band. These are reminiscent of the well known microlensing of the ASI1600.
The tests are on Sirius using Astronomik filters.
Any idea of the cause?
Here is an example in Ha, Sii and Oiii. 120 seconds, gain 120.
