ngc 6888

[alacant]

Hi everyone

Comparison; 2 and 4 hours. I thought that with the extra frames I'd be able to push more, Quite disappointing to see little improvement over the 2 hour snap with the same stretching.

Here is the 2 hour with a sensible stretch and a stretch and hope version of the 4 hour data...

Thanks for looking and any comments -especially on the stretching- most welcome.

700d on 250p 14x8min and 28x8min

 

[SteveA]

I think I agree with your comments and that the extra frames haven't really added anything to this image...bizarrely the second image actually "looks" noisier. I prefer the crisp cleaner appearance of the first image...lovely colours by the way..

Steve

[teoria_del_big_bang]

Another nice image. I would agree that the upper image looks to have a much clearer background.

Steve

[Craney]

20 minutes ago, SteveA said:

 the second image actually "looks" noisier.

I have found the same with my own results . It seems that the whole area has a sub-surface gaseous 'fuzz'  that just lifts out of the darkness when you stretch the image...

 

[newbie alert]

Stars on the second image have a blur to them..theyre not sharp as they are on first one..was it on the same night?

[MilwaukeeLion]

Really nice images, interesting test, would’ve thought same, more data more stretch. Clearly see additional structure in second image. Curious how second image looks using same stretch as first image.

[Gerry Casa Christiana]

21 hours ago, alacant said:

Hi everyone

Comparison; 2 and 4 hours. I thought that with the extra frames I'd be able to push more, Quite disappointing to see little improvement over the 2 hour snap with the same stretching.

Here is the 2 hour with a sensible stretch and a stretch and hope version of the 4 hour data...

Thanks for looking and any comments -especially on the stretching- most welcome.

700d on 250p 14x8min and 28x8min

 

Very strange. Stacked the same way? Bad couple of frames in there? Moon getting brighter? (Still don't know how you get these with the moon at 33%) something must be wrong. 

[alacant]

22 hours ago, newbie alert said:

the same night?

Hi. No. By the time it's high enough to begin imaging, there are only around 2 hours before sunrise. So 2 nights.

3 hours ago, Gerry Casa Christiana said:

the moon at 33%

This is at new moon and the night after. 

3 hours ago, Gerry Casa Christiana said:

Bad couple of frames in there

They look OK. I removed the camera between sessions to check collimation. Maybe that's not good for the flat frames. I don't think you can ever get it back exactly? The collimation was fine. I really wish I'd left it be.

[Gerry Casa Christiana]

A great first picture at any rate!