NGC 6188 Ha

[vlazg]

200208

200257My 1st attempt at narrowband.
Atik 11000, WO Flt 110, P 68 flattener, 8nm Baader Ha, 12x10 min light, ( i will be getting more data over the next few nights ) flats/darks/bias applied
SGPro, PHD2, Pixinsight.
The back focus is not correct, the stars at the edges are elongated. is there an easy way to fix this or use trial and error.
Its a bit pixelated due to compression for uploading.
Any help appreciated.

Stil collecting more data so i played a bit more

[Retrograde]

Looks great George!

[Atmos]

Still looks like a really nice shot George!
Trial and error is probably the only sure way to get the spacing correct :/

[vlazg]

Damn....Thanks Col and Pete

[PhilTas]

Looks terrific George, great image.
Cheers Phil

[billdan]

Looks pretty good to me George a lot of detail and resolution. The stars at the edge are not too bad, it could be camera tilt that is causing it.
I thought Pixinsight had a repair module to fix stars. I know Startools does.

Cheers
Bill

[vlazg]

Thanks Bill, all connections are screwed !!! feather touch focuser.....how do i check for camera tilt?

[billdan]

Hi George,

I also suffer from camera tilt which I think I have now repaired by carefully making sure the image train is snug against the focuser drawtube.

Colin (Atmos) started a thread about tilt and Greg has written a comprehensive procedure to solve it.

http://www.iceinspace.com.au/forum/showthread.php?t=146092

Cheers
Bill

[Andy01]

Looking good George!
I used to get camera tilt from my flt110, but it disappeared when I got one of these.... http://www.williamoptics.com/accessories/WO-Flat4-draw-tube-adapter_features.php
But maybe you don't have that issue with the Feather touch?
Anyway, keep up the good work!
Cheers
Andy