Hey Warren,
Is that a set of stacked pics?
It kinda looks like an effort I did a while back.
What settings did you use and processes did you apply?
just curious.
Cheers
Bartman
Hey Warren,
Is that a set of stacked pics?
It kinda looks like an effort I did a while back.
What settings did you use and processes did you apply?
just curious.
Cheers
Bartman
Hi Bartman,
It is a stack of 47 30sec images with darks at f4 done in DSS and processed in GIMP
Need to improve the noise to signal ratio... did you take bias frames to go with the darks?
If you can improve the tracking, get the image length longer. The longer the image, the less noise there is.
The more info you provide, the easier it is to help. How many darks? WHat camera/scope setup?
Need to improve the noise to signal ratio... did you take bias frames to go with the darks?
If you can improve the tracking, get the image length longer. The longer the image, the less noise there is.
The more info you provide, the easier it is to help. How many darks? WHat camera/scope setup?
HI Gem,
This was just on a standard Camera Tripod I had 5 Darks I haven't moved on to bias frames and haven't even researched them yet so don't know what they are. The Camera is a Nikon D200 with a 28mm f1.8 lens. The reason I haven't moved on to more complex bias and flats is that I have been trying to get the focusing and processing down pat before I try anything more complex.
Bias frames are used in conjunction with dark frames. A bias frame is an exposure as short as possible with the lens can on. If you take some dark frames, it is easy enough to then just change the exposure setting to the shortest and take a few bias frames.
Not bad for a standard tripod! Explains the slight trailing.
the pink nebula glow could come out more - and the "exploding" pixels could be less obvious.
I think, both might be due to too much highlight effect in the post processing.
and more darks and of course flats will greatly enhance the quality and make post processing easier, too.
I like your step-by-step-improvement approach and posting it here on IIS.
I benefit from your threads, too!
Bias frames are used in conjunction with dark frames. A bias frame is an exposure as short as possible with the lens can on. If you take some dark frames, it is easy enough to then just change the exposure setting to the shortest and take a few bias frames.
Not bad for a standard tripod! Explains the slight trailing.
Thanks Gem,
I didn't realise that bias frames were so simple I will be doing them now. I appreciate the comments
Quote:
Originally Posted by silv
ah,
may I chime in?
needle point stars
the pink nebula glow could come out more - and the "exploding" pixels could be less obvious.
I think, both might be due to too much highlight effect in the post processing.
and more darks and of course flats will greatly enhance the quality and make post processing easier, too.
I like your step-by-step-improvement approach and posting it here on IIS.
I benefit from your threads, too!
I noticed the exploding pixels too wasn't sure what caused it thanks for the info. Thanks for the feedback.
to me, it looks better than the first example. although, very noisy.
you could take flats now and add them to DSS file list.
the camera orientation looks easy enough to replicate - which is the important thing in flats.
(google how to take flats)
(you might need to work with "file groups" because the date stamp is different. but I'm not too sure about this. give it a try in the Main file list tab and see whether the flats are listed in the To-Do-summary of the stack.)
