At a loss here

[Anthony1979]

1 minute ago, alacant said:

Hi

The single frame looks pretty good to me. 

Thats what i thought this is why im trying not to give up on it.... To me it seem theres detail there

[Anthony1979]

I deleted everything ive stacked in frustration so im just restacking the lights only....

Is there a certain setting i should be using in dss.. I am using an unmodded dlsr 

[alacant]

22 minutes ago, Anthony1979 said:

setting i should be using in dss

No white balance. Don't do anything apart from save the file when it's finished stacking. 

[Anthony1979]

Is this right

Edited April 26, 2020 by Anthony1979

[Anthony1979]

[alacant]

10 minutes ago, Anthony1979 said:

Is this right

No. No white balance.

[alacant]

You are NOT stacking fits files. The fits tab is irrelevant. The Bayer pattern is in the NEF.

[Anthony1979]

What about this

[alacant]

9 minutes ago, Anthony1979 said:

What about this

Fine. Go ahead.

[Anthony1979]

Do i leave this as it is now and just save

[david_taurus83]

2 minutes ago, Anthony1979 said:

Do i leave this as it is now and just save

Yes

[Anthony1979]

1 minute ago, david_taurus83 said:

Yes

Even though RGB graph isnt aligned

[david_taurus83]

Yes, just leave it so. It should already have saved a file anyway. You can balance colour afterwards

[Anthony1979]

OK here is  the lights only stack

M101 LIGHTS ONLY.TIF

[alacant]

Here we are, luminance only in GIMP.

It's fine. conclusion: the flat frames were wrong. Easy fix. you now know exactly where to look next;)

Cheers and HTH.

 

[alacant]

Light leak? Badly misaligned frame?

Put a black shower cap over the mirror end and make sure no light is entering via the focuser. A dark room with a torch inside the tube is good for this. Discard any -badly- misaligned frames.

Sorry, no time ATM for a full process.

 

 

Edited April 26, 2020 by alacant

[Anthony1979]

11 minutes ago, alacant said:

Here we are, luminance only in GIMP.

It's fine. conclusion: the flat frames were wrong. Easy fix. you now know exactly where to look next;)

Cheers and HTH.

 

Thank you so much.... Ive just put mine in gimp and only adjusted the levels and it come out green

[happy-kat]

Correct.

The camera sensor bayer matrix means for every one red pixel and one blue pixel there are two green pixels. Hence until you balance the colours there is a green bias.

[alacant]

15 minutes ago, Anthony1979 said:

adjusted the levels and it come out green

Correct. Your camera produces twice as much green as B and R, use curves or color balance.

Maybe start a different thread for the processing? Here's a 5 minute stint in StarTools and GIMP

Must go now...!

 

[Anthony1979]

OK this is where im at with this image.. i added my dark to it..... so i am getting somewhere arnt i....... My processing is poor because i havent got a clue

[alacant]

Hi

GIMP? To remove vignetting and gradient. Quick method.

Layers:

Duplicate the layer

Blur the layer until you see no stars

Invert the blurred layer

Merge it. I found around 14% did it.

Merge down the layers

Re-adjust the levels

Experiment with layers, %, layer masks, masked stretches

You could also consider getting an astro processing program but learning GIMP first would be my recommended method; you're in total control rather than the computer;)

HTH

[Anthony1979]

4 hours ago, alacant said:

Hi

GIMP? To remove vignetting and gradient. Quick method.

Layers:

Duplicate the layer

Blur the layer until you see no stars

Invert the blurred layer

Merge it. I found around 14% did it.

Merge down the layers

Re-adjust the levels

Experiment with layers, %, layer masks, masked stretches

You could also consider getting an astro processing program but learning GIMP first would be my recommended method; you're in total control rather than the computer;)

HTH

Looks really complicated that... Thank you for getting this far.. Think i would had given up by now.... It is really hard work isnt it

[alacant]

1 hour ago, Anthony1979 said:

really complicated

OTC.  It takes less than 2 minutes.

Once you've done it a few times, a few seconds.

Have a go!

[happy-kat]

This has given me an idea on how I might final process out a severe off side gradient whilst retaining a more exposing stretch, thank you.

[ollypenrice]

On 25/04/2020 at 23:21, Ant said:

 

Also how many Flats are you using in your stack? If its an even number, remove one... I was always told that it needed to be an odd number for flats, darks and bias frames (never understood why).

Ant

 

This applies if you're using a median stacking routine for these files instead of a simple average. In my opinion it's guff, in practical terms, whether you are or you're not. You'll never tell the difference...

Olly