M101

[Miguel1983]

Hi,

just finished M101 after a troblesome start, there seems to be something wrong with my Bias frames, a friend let me use his bias and all worked out.

So, this is M101 from last weekend and past week.

I've shot 335 2min L subs , and on average 150 2min subs on R G and B.

I got 7 hrs of Ha data too, but i'll add them some other time.

 

Thanks for looking, commenting

[Ronclarke]

That's a great image, the colours are really rich and lots of detail, well done 👍

[John Nodding]

Fabulous image Miguel! 👍

[Erling G-P]

That's spectacular!

With the amount of Ha already visible, I can't imagine what it will be like if you add another 7hrs of it!

[geeklee]

Cracking image @Miguel1983.  A lot of detail and colour in there.👍

[Laurin Dave]

Very nice Miguel, great detail and colour.  looks like you are using ASI1600..  which is calibrated best using matched darks /flatdarks rather than bias, especially that from an different camera..  also best to take the camera off the scope to take your darks to make sure there are no light leaks.  It'll be even better

Dave

[Miguel1983]

14 hours ago, Laurin Dave said:

Very nice Miguel, great detail and colour.  looks like you are using ASI1600..  which is calibrated best using matched darks /flatdarks rather than bias, especially that from an different camera..  also best to take the camera off the scope to take your darks to make sure there are no light leaks.  It'll be even better

Dave

Hi, i have tried flat darks, no success 

the problem was that the flats were over correcting.

I have tried several settings, it’s a mystery.

Using my friend’s bias solved it, explain that 🤷🏻‍♂️

[Laurin Dave]

I can't!   Very odd...  how are you calibrating your flats? 

[geoflewis]

That is one gorgeous M101 Miguel, it doesn't look like it needs any Ha added. Which scope was that take with?

[Miguel1983]

2 hours ago, Laurin Dave said:

I can't!   Very odd...  how are you calibrating your flats? 

If you mean how i shoot them, i use APT CCD flats aid with a minimum exposure length of 0,2sec and i use a LED drawing panel and white paper to dim it more.

After that i just trow everything in DSS

[Miguel1983]

1 hour ago, geoflewis said:

That is one gorgeous M101 Miguel, it doesn't look like it needs any Ha added. Which scope was that take with?

This was taken with the Esprit 120

[Laurin Dave]

Do you have "dark optimisation" disabled?  if so then I really have no idea what's going on... if not then try it with your matched darks

[Miguel1983]

25 minutes ago, Laurin Dave said:

Do you have "dark optimisation" disabled?  if so then I really have no idea what's going on... if not then try it with your matched darks

These are my settings in DSS, its in dutch, but its all in the same place 🙂

[Laurin Dave]

I don't use it I'm afraid so not familiar with it, I just know that dark optimisation should be turned off

[Miguel1983]

On 29/03/2020 at 16:02, Laurin Dave said:

I don't use it I'm afraid so not familiar with it, I just know that dark optimisation should be turned off

i'll look into that, thanks