asiair flats NB

[Fieldsy]

Hi all

Does anyone have a idea how to get the best flats with asiair ?

Everything I find talks about the adu number .

How would you try and work this out with a mono cam and using NB filters ?

So I have just taken x20 of Ha,Olll,S

0.5, 3, 10, 30 secs subs and then once on dss will work out the better one seems a bit long winded.

Thanks for any advice.

[Adam J]

2 hours ago, Fieldsy said:

Hi all

Does anyone have a idea how to get the best flats with asiair ?

Everything I find talks about the adu number .

How would you try and work this out with a mono cam and using NB filters ?

So I have just taken x20 of Ha,Olll,S

0.5, 3, 10, 30 secs subs and then once on dss will work out the better one seems a bit long winded.

Thanks for any advice.

If the ASIAIR displays a histogram then you are looking for the peak to be about half way along the graph. Don't forget to get some dark flats too at the same exposure length. 

I am a bit surprised that it does not have a optimal exposure calculator for FLATS. 

Adam 

[Adreneline]

11 minutes ago, Adam J said:

I am a bit surprised that it does not have a optimal exposure calculator for FLATS. 

Me too! In fact I'm a bit disappointed but there it is. I use an app on my iPad as a light source and found it was best to set an exposure time (e.g. 2 seconds or whatever) on the ASIair and then adjust the screen brightness to get the histogram peak mid-way along the axis. As you recommended I took dark-flats at the same time. Got there in the end but it's not as easy as it is with something like SGPro.

Adrian

[Fieldsy]

12 minutes ago, Adam J said:

If the ASIAIR displays a histogram then you are looking for the peak to be about half way along the graph. Don't forget to get some dark flats too at the same exposure length. 

I am a bit surprised that it does not have a optimal exposure calculator for FLATS. 

Adam 

Yeah I’ve done darks and bias and done a few flats but I didn’t  use histo as it’s always on auto and I can see my image in pic anyway. So I will stack the flats and see what I get 🤞🏻
 

[Fieldsy]

2 minutes ago, Adreneline said:

Me too! In fact I'm a bit disappointed but there it is. I use an app on my iPad as a light source and found it was best to set an exposure time (e.g. 2 seconds or whatever) on the ASIair and then adjust the screen brightness to get the histogram peak mid-way along the axis. As you recommended I took dark-flats at the same time. Got there in the end but it's not as easy as it is with something like SGPro.

Adrian

I reckon as I’ve done 0.5 ,3 ,10 , and 20 sec flats one set should be ok .

[Fieldsy]

Hi so I'm in dss looking at subs and I've noticed I have 4 files per sub  what one should I click to stack or just take all?

As In pic

_1_thn.jpg

_1_.fit

_thn.jpg

.fit

 

[Adreneline]

4 minutes ago, Fieldsy said:

what one should I click to stack or just take all?

Only stack the .fit files - I'd dump the jpg thumbnails - I think they are only there to provide reassurance you have something of an image.

Adrian