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Combining image data with different f ratios [Deep Sky] Processing techniques · Peter Goodhew · ... · 2 · 184 · 0

PeterGoodhew 4.73
Peter Goodhew
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I'm looking for advice suggestions on how to combine data between systems with differing f ratios - in my case specifically f/1.9 with f/7.9.
For example 5 hours at f/1.9 with 10 hours at f/7.9.
Creating a single stack of all data doesn't seem to work well, so the alternative of combining a f/1.9 stack with a f/7.9 stack seems more appropriate.  The question then arises as to how much weight to apply to each stack?
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LRamalho 0.00
Luís Ramalho
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Hi Peter,

Maybe this video will be helpful: https://www.youtube.com/watch?v=aRdrwrzNfbQ&t=301s

Best regards,

Luís Ramalho
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andreatax 9.89
andrea tasselli
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Peter Goodhew:
I'm looking for advice suggestions on how to combine data between systems with differing f ratios - in my case specifically f/1.9 with f/7.9.
For example 5 hours at f/1.9 with 10 hours at f/7.9.
Creating a single stack of all data doesn't seem to work well, so the alternative of combining a f/1.9 stack with a f/7.9 stack seems more appropriate.  The question then arises as to how much weight to apply to each stack?

*Assuming we're talking PI here (do we?) make a copy of each and assuming they are properly scaled and aligned then use Imageintegration with Normalization set to Additive with Scaling and Weights set as SNR. Rejection as seen fit.
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