I tried my first imaging run using SG Pro last night. I used it to capture the lights, darks, and bias frames. I took the flats by hand with the Canon 60DA after disconnecting the computer from the mount.
Today while trying to remove the bias from the flats using Nebulosity 3, I got an error message that the images were not the same size. Sure enough, the bias frames shot by hand were at the normal CR2 resolution of 5184x3456 pixels. However, the lights, darks, and flats taken with SG were at a resolution of 5202x3465. That is 18 pixels wider, and 9 pixels higher than usual. I have no idea how this is possible, but it stopped me from using the flats for the image. I have just finished stacking 12 5 minute subs of the NA Nebula, calibrated with 9 darks. I have a really bad crosshatch pattern throughout the image. I’ve never seen this before, and don’t know if it is related to SG, or a mistake I made in processing. Google here I come…
If anyone has any idea why SG would not be shooting at the normal CR2 resolution, please let me know. Thanks!