NGC4565 20hours

[Adam J]

First attempt at galaxy imaging with the Esprit 100 / ASI1600MM Pro.

Also the first outing for my recently aquired AZEQ6 GT.

1200 x 30s Lum

100 x 90s RGB per channel.

Big Crop.

Full Image

Thanks for looking.

Adam

Edited April 26, 2020 by Adam J

[souls33k3r]

Yikes! This is great mate. Mind if I ask a few questions about both why and how you decided to go for such short those exposures? 

[Kinch]

Nicely processed - looks really good.

[Adam J]

17 minutes ago, souls33k3r said:

Yikes! This is great mate. Mind if I ask a few questions about both why and how you decided to go for such short those exposures? 

I have quite alot of light polution so with the low read noise of the ASI1600mm pro you reach deminishing returns quite early, I could even go shorter and still burry the read noise, but 1000+ images already takes a long time to stack and a large SSD. With shorter exposures I find that I have more flexibility I discarded any exposure that did not give very good star shape and FWHM mainly due to seeing, so about 5 hours of data was chucked as it did not make the cut. The RGB is tripple the exposure length because with 1/3rd the light comming in it takes 3 times the exposure to burry the read noise as with lum. NINA has a optimum exposure calculator that can help. I have started to use a formula or total lum exposure = combined RGB exposure and that seems to work quite well.

Adam

Edited April 26, 2020 by Adam J

[tooth_dr]

Cracker! So much detail when zoomed in, such fine disc detail. Well done. 

[Adam J]

2 minutes ago, tooth_dr said:

Cracker! So much detail when zoomed in, such fine disc detail. Well done. 

Thanks I was quite pleased for 550mm focal length :)

[tooth_dr]

Just now, Adam J said:

Thanks I was quite pleased for 550mm focal length

550mm! I thought it was 1050mm. Bonkers. 

[PadrePeace]

Another cracking project following on from your outstanding Heart Nebula. Big target or small, you prove that integration time and putting the hours in under the stars is a sure way of getting to impressive detail and images plus a little skill with the mouse of course.

How are you finding NINA? Best bit and worst?

[Adam J]

1 hour ago, PadrePeace said:

Another cracking project following on from your outstanding Heart Nebula. Big target or small, you prove that integration time and putting the hours in under the stars is a sure way of getting to impressive detail and images plus a little skill with the mouse of course.

How are you finding NINA? Best bit and worst?

I like the level of automation but I think that some additional features such as pauses and options to refocus on specific filter changes could be added to the sequencer. I also like the autofocus stuff but that is new to me.

Adam

[Adam1234]

Lovely image. What gain and offset settings did you use with the asi1600mm pro?

[Physopto]

Very nice image and nice detail.

Derek

[Adam J]

22 minutes ago, Adam1234 said:

Lovely image. What gain and offset settings did you use with the asi1600mm pro?

Gain 76 Offset 50

[John Nodding]

Adam, I think this is one of my favourite images that I’ve had the pleasure of seeing on here so far. It really emphasise the vastness of space. Love the simplicity of it and of course the detail, just fabulous! 👍🏻
 

Noddy

[silentrunning]

Lovely image Adam of one of my favourite objects.