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I use the Takahashi wide T-Ring, not a standard one and get very little if any vignetting.
I know my camera orientation when I take my flat field shots, I use the centre line of the telescope and camera and have marks on the focuser tube for my various combinations (Tak 1.6x extender or Tak reducer).
I use DSLRFocus for my focus and download control and only download straight to my Laptop, RAW shots, ImagesPlus will then convert your RAW's to TIF's.
The only jpg shots I do are for focusing.
A typical imaging run for me would be, focus with DSLRFocus, automate maybe 20 - 25 Lights, depending on the length of exposure, 30 - 60 seconds between shots, then darks with identical times, all downloaded straight to the Laptop as RAW's.
I then download to my main computer and Auto Process in ImagesPlus, all conversions etc are down within that process.
Your end files within ImagesPlus should end up with a Master Dark, Master Flat and a Combined Average, these will be TIF's.
Hope that helps a little.
Cheers
JohnG
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