![]() ![]() In some instances that wrong gain setting had somehow unintentionally carried over to the imaging sequence. However, to speed up the focusing routine, many of the focus frames were taken using gains of 300 or 400. ![]() Narrowband imaging with these 3nm filters and the FSQ-106 is usually done using 300s (5 min) exposures at Gain 100. This meant a lot more calibration frames when using the Aurora. For the Aurora I had to modify exposure times to get to a target ADU, whereas for the Flatmaster, which brightness can be adjusted in software, all frames could be taken at 5s. The result is that the RGB images were calibrated using the Aurora flatpanel, while the SHO images were calibrated using the Flatmaster panel. During this period I was testing out different flat panels. And while I did refocus fairly regularly, still some frames had to be thrown out due to poor focus. The shift in focus during that first 1-2h of imaging is quite significant. ![]() A drawback of these last minute decisions however, is that the telescope is still acclimating to the cold outside temperatures during imaging. The new setup with rolling pier proved itself extremely efficient and allowed very short setup times. For some sessions even, the decision to setup and image was made well into the evening. Due to the fluctuating weather conditions the equipment was not left outside between all five imaging sessions. The Takahashi FSQ-106 was used for this image in its standard configuration and paired to the ASI6200MM full frame camera. ![]()
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