Flat frames

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GKA
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Flat frames

Post by GKA »

How many flat frames do you take?
I have read evrything from 200 to as many as the lights.
In my other thread i made 500 flat frames, but the light frames were a stack of 5000, which i felt was not enough.
Any advise for a newbie?
Thanks.


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Re: Flat frames

Post by MAURITS »

In FireCapture I use 25 flat frames and in SharpCap I use 100 flat frames.


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Re: Flat frames

Post by GKA »

Not more? I use them in autostakkert, and thought i would need a lot more than the 500 i took.
But when i take a video with 5000 frames woulden't i need a lot more flats, at least to create a master flat.?


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Re: Flat frames

Post by marktownley »

I generally don't both with them, but on the rare occasion I do, I use a stack of 50 in FC.

Why do you want to take flats?


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Re: Flat frames

Post by GKA »

To remove the dirt on the camera, and because i have read about it, and last but not least, because I'm a newbie in this😄


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Re: Flat frames

Post by marktownley »

Easiest way is just to clean the chip!


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Re: Flat frames

Post by EGRAY_OBSERVATORY »

I thought flats were for night-time imaging and have never done that with Solar-imaging, but then what do I know...

As Mark says about cleaning the chip, or even better don't let the dirt/dust get into any part of the optics !!!

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Re: Flat frames

Post by christian viladrich »

35 s acquisition x 150 fps = about 5000 frames ;-)
This is only for narrow field imaging. The trick is to move the field of view of the telescope during acquisition.


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Re: Flat frames

Post by GKA »

christian viladrich wrote: Thu Apr 29, 2021 7:43 pm 35 s acquisition x 150 fps = about 5000 frames ;-)
This is only for narrow field imaging. The trick is to move the field of view of the telescope during acquisition.
Yep,probably to many , how many frames do you guys take , not flats , but lights.


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Re: Flat frames

Post by GKA »

EGRAY_OBSERVATORY wrote: Thu Apr 29, 2021 7:30 pm I thought flats were for night-time imaging and have never done that with Solar-imaging, but then what do I know...

As Mark says about cleaning the chip, or even better don't let the dirt/dust get into any part of the optics !!!

Terry
Well i saw this video , and this guy take seriously great pictures , and he uses flats , so i guess there is diffrent opinions.
I think he is a member here to.
but the less frames i have to take , the better , because they sure fill up my computer storage :lol:
https://www.youtube.com/watch?v=G-41RMTCdTE&t=2167s
And i also read this.
https://photographingspace.com/solar-flat-fields/


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Re: Flat frames

Post by marktownley »

GKA wrote: Thu Apr 29, 2021 9:33 pm
EGRAY_OBSERVATORY wrote: Thu Apr 29, 2021 7:30 pm I thought flats were for night-time imaging and have never done that with Solar-imaging, but then what do I know...

As Mark says about cleaning the chip, or even better don't let the dirt/dust get into any part of the optics !!!

Terry
Well i saw this video , and this guy take seriously great pictures , and he uses flats , so i guess there is diffrent opinions.
I think he is a member here to.
but the less frames i have to take , the better , because they sure fill up my computer storage :lol:
https://www.youtube.com/watch?v=G-41RMTCdTE&t=2167s
And i also read this.
https://photographingspace.com/solar-flat-fields/
Yes, but you don't have an uneven field, so just clean the dirt off the chip... Definitely the easiest way to do it...


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Re: Flat frames

Post by DavidP »

When I take flats, I generally capture about 20 frames. It’s hard to imagine why somebody could benefit from more than 100.


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