I have a strange issue with my ASI1600MM-Pro, though maybe it's imaginary.
I normally only cool to 0°, so I have some TEC capacity left when I'm at locations with a high overnight temperature. Recently I decided to grab new darks at -15°C for those cooler nights, but I noticed this pattern in the stretched images (see attached, upper left). Is this just a very slight gradient that the auto-stretching highlights out, is it "AMP" glow despite the cooling, or is this something else?
I'm hoping it's not the sensor de-laminating from the backplane....
- All the software I use employs the ASI-prescribed cooling rate in the driver, plus I've rarely cooled below 0°C. This makes me doubtful that this might be thermal shock.
- I don't normally slowly warm the sensor, because it's usually only 20°C below ambient. I hear arguments both ways, but again I doubt this is thermal shock.
- Frames are being captured with the scope in the house, shaded, with 72°F temperature @42% humidity (according to UPBv2).
- The scope cover is on, and I don't believe this is caused by light leakage.
- If I increase the temp above 0, it seems to go be significantly reduced in intensity.
- This doesn't seem to happen with my other cooled cameras (or is just too subtle to see). However, my other cameras cannot get quite as cool as the ASI1600.
- This pattern doesn't really match the AMP glow pattern noted here, but I'm not sure if there's a difference between the ASI1600 mentioned in the article and the ASI1600MM-Pro I have.
Any ideas? Thanks in advance!
Edited by MountainAir, 02 June 2020 - 04:32 PM.