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Dark Nebula Wide Field in Aquila

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#1 Dean J.

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Posted 27 June 2022 - 11:27 AM

Was able to get out for a good [non-windy] night out in the San Diego County desert on Saturday night. 

 

This was my first opportunity to use my new ASI2400MC Pro OSC camera with the FSQ-106 + 645 f/3.6 reducer [~381 mm focal length].  The FSQ + reducer + full frame camera really gives a giant field.  cool.gif

 

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I'm looking forward to using this combo on more Milky Way targets as the summer progresses.


Edited by Dean J., 27 June 2022 - 12:46 PM.

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#2 jsmithsd

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Posted 27 June 2022 - 12:41 PM

Congratulations on a fine image of dark nebula!

I also have the ASI 2400MC-Pro camera and love it.


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#3 David Rosenthal

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Posted 27 June 2022 - 12:51 PM

That field is super flat.  Impressive image.  I just got the same chip in a QHY268M camera and it is not flat on my 106 + Reducer QE.  My FR's imaging circle is no where near as good as the one from the 645 FR


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#4 David Rosenthal

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Posted 27 June 2022 - 12:55 PM

OMG the Takahashi 645 Reducer QE is more expensive than my new camera !!!!


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#5 Dean J.

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Posted 27 June 2022 - 01:54 PM

OMG the Takahashi 645 Reducer QE is more expensive than my new camera !!!!

smile.gif 

 

Yeah, the 645 0.72x reducer QE for the FSQ-106 isn't cheap.  But it is a nice upgrade to the scope.  Combined with the IMX410 detector - either the ASI2400MC Pro or the QHY 410C - it looks like it is going to make a great wide field astrograph.

 

This was the first image with the scope + reducer + camera combo and it looks like I overexposed the stars at 180 seconds so the next outing I will try 120 seconds and hopefully I will start to see some color in the stars.



#6 calypsob

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Posted 28 June 2022 - 12:19 PM

Starting to see more and more 2400 data, that thing is a killer!
Very nice job on this image, stars look great, data is very clean.
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#7 Look at the sky 101

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Posted 28 June 2022 - 12:34 PM

Fine field. 


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#8 Dean J.

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Posted 28 June 2022 - 01:08 PM

Starting to see more and more 2400 data, that thing is a killer!
Very nice job on this image, stars look great, data is very clean.

Yes, I think that the ASI2400 is going to turn out to be a good camera for my interests.  This first example is a bit overexposed.  Almost all of the stars are saturated and don't show color at 180 seconds at f/3.6.  So, for the next outing I am going to try 120 seconds and see if I can get star colors back.



#9 andysea

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Posted 28 June 2022 - 08:06 PM

That's a fine image. I am also using the ASI 2400 and so far I'm really impressed with it. With the Epsilon 180 I do 120s subs so that I don't saturate too many stars. I haven't put it on the FSQ yet.


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#10 Dean J.

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Posted 28 June 2022 - 11:21 PM

That's a fine image. I am also using the ASI 2400 and so far I'm really impressed with it. With the Epsilon 180 I do 120s subs so that I don't saturate too many stars. I haven't put it on the FSQ yet.

Thanks Andy.  If I recall correctly you also have one or more of the FSQ reducers as well.  I’ll be interested to see what you get with the camera on the FSQ.  The field of view with the FSQ + 645 reducer + ASI2400 is impressive.  I’m looking forward to working my way through the Milky Way with it… if the weather cooperates.



#11 andysea

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Posted 29 June 2022 - 12:22 AM

Thanks Andy.  If I recall correctly you also have one or more of the FSQ reducers as well.  I’ll be interested to see what you get with the camera on the FSQ.  The field of view with the FSQ + 645 reducer + ASI2400 is impressive.  I’m looking forward to working my way through the Milky Way with it… if the weather cooperates.

I have the f3 reducer. I don't have an adapter for the 2400 but I will probably make one tomorrow so that I can try it. However the Epsilon is pretty awesome with the 2400. I am having a lot of fun with it. 


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#12 Mert

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Posted 29 June 2022 - 06:29 AM

Wow, that's a fantastic (flat) field of view, even down to the corners!
Great image

Edited by Mert, 29 June 2022 - 06:30 AM.

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#13 Jim Thommes

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Posted 29 June 2022 - 05:07 PM

Its a great image Dean! It is amazing how wide the field is  with this setup. As mentioned in a previous comment the field looks really flat. You can look at the full resolution image and see it looks great from middle to corners.

 

 Congrats on the first light for the 2400MC.


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#14 Dean J.

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Posted 30 June 2022 - 09:36 AM

Its a great image Dean! It is amazing how wide the field is  with this setup. As mentioned in a previous comment the field looks really flat. You can look at the full resolution image and see it looks great from middle to corners.

 

 Congrats on the first light for the 2400MC.

Thanks Jim.

 

Yes, this first image with this configuration looks pretty good as far as star shape across the field.  There are too many stars to get much of a reading on how much star color distortion there actually is.  There is some distortion in the shape of the tiny stars and I do expect that in a more sparse star field I will be able to see some lateral color in the stars and some distortion.  I am not that critical of that sort of thing though and I probably won't be posting aything at 100% resolution on the web, so I think that the larger pixels of the full frame ASI2400MC is a better match for my system than the smaller pixels of the full frame ASI6200MC.




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