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NGC 4565 The Needle Galaxy


Dmack1
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Lovely image. Lovely core bulge and great detail in the clouds.

Will be interested in the answer to your binning question too. As I understand it, the CMOS cameras don't bin in the sensor, they bin after reading out the pixel values, so you don't get a noise benefit like you would with a CCD. The only benefit is a smaller file to transfer from the camera, so in that case you might as well defer the binning until later. I always process at full resolution and scale the image towards the end, but all of the Startools tutorials I've watched recommend binning as step 1. 

Did you decide to bin based on your pixel scale? I presume you're around 0.5"/px?

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Thanks Padraic.

 

Yes thats what I was thinking too but i dont really understand all that signal processing tech speak!! what I'm wondering is if I want to bin in, say, PI, how exactly do I go about it and am i going to gain any SNR improvement? If not then there does not seem much point.

 

Yes  - the platesolve readout in APT was saying 0.48"/pixel and with Irish seeing that really seemed a bit pointless.

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19 minutes ago, Dmack1 said:

Yes thats what I was thinking too but i dont really understand all that signal processing tech speak!! what I'm wondering is if I want to bin in, say, PI, how exactly do I go about it and am i going to gain any SNR improvement? If not then there does not seem much point.

Very nice image. Some great detail.

 

This is what you will need to bin the images in Pixinsight. I have never used it, as I don't need to bin my images.

https://pixinsight.com/doc/tools/IntegerResample/IntegerResample.html

 

Brian

 

 

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56 minutes ago, AstronomyUkraine said:

Very nice image. Some great detail.

 

This is what you will need to bin the images in Pixinsight. I have never used it, as I don't need to bin my images.

https://pixinsight.com/doc/tools/IntegerResample/IntegerResample.html

 

Brian

 

 

Thanks for that Brian. I hope to get some more data this week so I'll give it a go.

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