The Flats calibration wizard is failing to deterministically select a proper value. I believe the behavior indicated below is causing it. I am using a Nikon D5500 at the moment. Trying for a 10k mean ADU as a target flat. Feels low but Im not sure what the behavior below means to the quality of the flat being generated.
Link to Logs
Experimenting manually with exposure times I have noticed the following aberrations:
- Manually incrementing exposure times reveals a staircase response of exposure time to ADU values from about 0.7seconds and ~10k mean ADU. Steps start over around 0.15sec then go up to 0.3sec close to the saturation point.
- Manually asking for a 1/8000 or 1/4000 in decimal value in SGP Pro will not work. I get the next step up if I do that. I need to set the exposure time to 0 to get 1/8000 on my D500 and 1/4000 on my D5500. Is it possible the stair cases Im seeing is due to the exposure time not actually varying correctly?
OS: Windows 10 Pro