M17 Swan Nebula from A.S.I.G.N.

[ASIGN_Baz]

I had a slight tracking problem, which means I will be doing this one again, however, I am still very happy with the image data. It was good practice.

7 x 4 Minute exposures, stacked on Deep Sky Stacker with offsets and darks removed. Cropped and resized.

Manual guided Canon400D on Skywatcher Pro series ED80.

Baz.

[centroid]

I can see the 'tracking' problem Baz, but other than that, not a bad DSLR image.

Dave

[MartinB]

There's a lovely swan there Baz. What a shame about the tracking, what was the problem?

[ASIGN_Baz]

There's a lovely swan there Baz. What a shame about the tracking, what was the problem?

It's tracking Martin

All the subs have long stars. I think it's because of 2 reasons.

1. I had the ISO on 1600. Didn't realise it until after the session.

Fix: I will drop to a more forgiving ISO800 next time and do more subs.

2. Also, the guide star I used for manual tracking was too dim. I had to use averted vision sometimes to see it, so I couldn't keep it accurately centred.

Fix: I will use a brighter guide star.

Lessons learned!

Baz.

[geppetto]

Lessons learned!

That's what this game is all about

Never mind the tracking Baz, it's still a nice swan 8)

[barkis]

Yeah, I sympathise Baz, that image is nice, but would have been tremendous had the tracking not failed you.

Ron.

[proflight2000]

could remove the star trailing with photoshop elements i bet.

[MartinB]

could remove the star trailing with photoshop elements i bet.

Don't know about elements but I had a play in PS and couldn't come up with anything very satisfactory - the 'thickness' of the trail isn't regular so the duplicate layer/darken/offset method doesn't work very well.