7331 and stephan's

[alacant]

Hi everyone. This was a 'Is it doable at 1200mm?' session. It's quite small and the 18x4min snaps make it noisy. It maybe worth adding a few more frames. Or am I flogging a dead newt?

Thanks for looking and clear skies.

 

[tooth_dr]

That’s tasty. I think I’ll try that in my 250 at same FL. 

[alacant]

20 minutes ago, tooth_dr said:

I’ll try that in my 250 at same FL

That would be good to compare. You should need a lot less time:)

[tooth_dr]

21 minutes ago, alacant said:

That would be good to compare. You should need a lot less time:)

Out of curiosity what did you centre your frame on? It’s really well framed. 

[wimvb]

2 hours ago, alacant said:

Hi everyone. This was an 'Is it doable at 1200mm?' session. It's quite small and the 18x4min snaps make it noisy. It maybe worth adding a few more frames. Or am I flogging a dead newt?

Thanks for looking and clear skies.

 

 

It's certainly doable, you're definitely not flogging a dead newt. But if you keep at it, you can beat the noise out of it. On my mobile device, it looks like there's either faint dust lurking in the background, or the background is slightly uneven. More data may determine what it is.

[alacant]

2 hours ago, tooth_dr said:

what did you centre your frame on?

Hi. In CDC, overlay your FOV and copy the RA and DEC where you want the centre to be, paste the same coordinates into APT, now hit goto++ in APT.  Here's the plate solve. HTH.

[alacant]

25 minutes ago, wimvb said:

background is slightly uneven

Yeah. Am hoping that flat frames will shift it. Cheers.

[tooth_dr]

3 minutes ago, alacant said:

Hi. In CDC, overlay your FOV and copy the RA and DEC where you want the centre to be, paste the same coordinates into APT, now hit goto++ in APT.  Here's the plate solve. HTH.

Fantastic. Thanks. 

[alacant]

Hi again. This is with another 18 snaps added. Now over 2h30m. I'm almost convinced than more exposures makes for a better image. It's certainly easier to process without having to jump through hoops fighting the noise. It also reveals detail that wasn't forthcoming with the shorter exposure. Maybe it needs a bit of unsharp mask? Thanks for your patience.

[tooth_dr]

Definitely animprovement there, lots of detail. 

[Waldemar]

'Almost' convinced?
It is a fact that more integration time reveals more details with less noise.

I've seen 36 hours integration time on M31, one of the brightest DSO's in the sky. Totally mindblowing! 

[wimvb]

A lot better. But it looks like  you're clipping the background in this newer version.

[alacant]

48 minutes ago, wimvb said:

you're clipping the background

What? On SGL? Strictly forbidden! 

 

[alacant]

4 hours ago, Waldemar said:

'Almost' convinced?

Yes, but fast approaching, 'very, very nearly':)