[alpal]

Update 10.10.10.

I found out what was wrong with focuser.
I had never tightened up the 4 screws on the side
that adjust the friction.
In the day time I could see that when the screws were "loose" that the
main locking screw when tightened - would tilt the focuser.
Hopefully - that's fixed now.

I took 3 dark frames & some light frames to see how
well I'm doing with any vignetting.

I attach the result for the flat L frame.
If a level of 69 is = to 100% brightness then you can see from the picture
that the worst spot is the bottom left hand corner which is 30% down in level.
I wonder if that is acceptable?
I could take the nose piece off the camera & redo everything to improve that - I think?


The other pictures have scrubbed up alright with a bit of processing.
I cheated & used offset with blend mode to darken to round up the stars
that were affected by bad guiding from wind gusts.
Adding darks & flats has improved them a lot.
I found that the blue frame was the least affected by wind gusts for Tuc 47 so
I used it as a luminance & a reference frame when stacked.
Therefore - no luminance frame was used.

I used 3 x 2 minute L frames stacked for NGC 253
That's not bad for 3 x 2 minutes binned 1x1 of for an out of focus result.

NGC 300 is only 1 x 5 minute frame.
You can just make out the center of the galaxy -
it's a dim one for the light polluted suburbs.

I think I'm ready for the next clear night as is?

cheers

Allan